Merge ~cjwatson/launchpad:black-23.3.0 into launchpad:master

[Colin Watson]

Upgrade to black 23.3.0

This introduces the 2023 stable style.

[Guruprasad (lgp171188)]

LGTM 👍

review: Approve

[Otto Co-Pilot (otto-copilot)]

Merging failed
https://jenkins.ols.canonical.com/online-services/job/launchpad/3303/

diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index 0f3d230..9a38809 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -106,3 +106,5 @@ a0cc45d527f251438cff74b4134e7a66fba42ac7
 9c7e734d893362de4461910d309d9891558c9634
 # apply blackdoc on the complete codebase
 78a72ed0e3f5be6c727f4981d6a09e978cde4b7e
+# apply black's 2023 stable style
+ee5977f514d584c64afe453ac9d2eaa0fdbc3afd
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index dab74e2..c4198d7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -36,7 +36,7 @@ repos:
             |utilities/community-contributions\.py
           )$
 -   repo: https://github.com/psf/black
-    rev: 22.12.0
+    rev: 23.3.0
     hooks:
       - id: black
         exclude: |
diff --git a/cronscripts/update-bugzilla-remote-components.py b/cronscripts/update-bugzilla-remote-components.py
index b98b467..e002dac 100755
--- a/cronscripts/update-bugzilla-remote-components.py
+++ b/cronscripts/update-bugzilla-remote-components.py
@@ -35,7 +35,6 @@ class UpdateRemoteComponentsFromBugzilla(LaunchpadCronScript):
 
 
 if __name__ == "__main__":
-
     updater = UpdateRemoteComponentsFromBugzilla(
         "updatebugzillaremotecomponents",
         dbuser=config.updatebugzillaremotecomponents.dbuser,
diff --git a/lib/launchpad_loggerhead/app.py b/lib/launchpad_loggerhead/app.py
index b7496ae..d05e207 100644
--- a/lib/launchpad_loggerhead/app.py
+++ b/lib/launchpad_loggerhead/app.py
@@ -208,7 +208,6 @@ class RootApp:
         )
         lp_server.start_server()
         try:
-
             try:
                 branchfs = self.get_branchfs()
                 transport_type, info, trail = branchfs.translatePath(
diff --git a/lib/launchpad_loggerhead/session.py b/lib/launchpad_loggerhead/session.py
index 48d213d..45e32fe 100644
--- a/lib/launchpad_loggerhead/session.py
+++ b/lib/launchpad_loggerhead/session.py
@@ -13,7 +13,6 @@ from lp.services.config import config
 
 
 class LaunchpadSecureCookie(SecureCookie):
-
     # The default of sha1 is a bit too weak.
     hash_method = staticmethod(hashlib.sha256)
 
diff --git a/lib/lp/answers/browser/person.py b/lib/lp/answers/browser/person.py
index 6d06aa1..a684d11 100644
--- a/lib/lp/answers/browser/person.py
+++ b/lib/lp/answers/browser/person.py
@@ -261,7 +261,6 @@ class PersonAnswerContactForView(LaunchpadView):
 
 
 class PersonAnswersMenu(NavigationMenu):
-
     usedfor = IPerson
     facet = "answers"
     links = [
diff --git a/lib/lp/answers/browser/tests/test_questionmessages.py b/lib/lp/answers/browser/tests/test_questionmessages.py
index 0e1bb02..0911bd6 100644
--- a/lib/lp/answers/browser/tests/test_questionmessages.py
+++ b/lib/lp/answers/browser/tests/test_questionmessages.py
@@ -19,7 +19,6 @@ from lp.testing.pages import find_tag_by_id
 class TestQuestionMessageVisibility(
     BrowserTestCase, TestMessageVisibilityMixin
 ):
-
     layer = DatabaseFunctionalLayer
 
     def makeHiddenMessage(self, comment_owner=None):
@@ -44,7 +43,6 @@ class TestQuestionMessageVisibility(
 class TestHideQuestionMessageControls(
     BrowserTestCase, TestHideMessageControlMixin
 ):
-
     layer = DatabaseFunctionalLayer
 
     control_text = "mark-spam-0"
diff --git a/lib/lp/answers/browser/tests/test_questiontarget.py b/lib/lp/answers/browser/tests/test_questiontarget.py
index b9a8bd2..24a1261 100644
--- a/lib/lp/answers/browser/tests/test_questiontarget.py
+++ b/lib/lp/answers/browser/tests/test_questiontarget.py
@@ -28,7 +28,6 @@ from lp.testing.views import create_initialized_view, create_view
 
 
 class TestSearchQuestionsView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_matching_faqs_url__handles_non_ascii(self):
@@ -65,7 +64,6 @@ class TestSearchQuestionsView(TestCaseWithFactory):
 
 
 class TestSearchQuestionsViewCanConfigureAnswers(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_cannot_configure_answers_product_no_edit_permission(self):
diff --git a/lib/lp/answers/interfaces/faq.py b/lib/lp/answers/interfaces/faq.py
index 7d18c7b..42d64d1 100644
--- a/lib/lp/answers/interfaces/faq.py
+++ b/lib/lp/answers/interfaces/faq.py
@@ -35,7 +35,6 @@ class CannotDeleteFAQ(Exception):
 
 
 class IFAQPublic(IHasOwner):
-
     id = exported(
         Int(
             title=_("FAQ Number"),
diff --git a/lib/lp/answers/interfaces/questionjob.py b/lib/lp/answers/interfaces/questionjob.py
index 5700e9a..21e218f 100644
--- a/lib/lp/answers/interfaces/questionjob.py
+++ b/lib/lp/answers/interfaces/questionjob.py
@@ -49,7 +49,6 @@ class IQuestionJob(Interface):
 
 
 class IQuestionEmailJob(IQuestionJob, IRunnableJob):
-
     user = Attribute("The `IPerson` who triggered the email.")
 
     subject = Attribute("The subject of the email.")
diff --git a/lib/lp/answers/model/tests/test_question.py b/lib/lp/answers/model/tests/test_question.py
index 15ec010..6040354 100644
--- a/lib/lp/answers/model/tests/test_question.py
+++ b/lib/lp/answers/model/tests/test_question.py
@@ -13,7 +13,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestQuestionDirectSubscribers(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_get_direct_subscribers(self):
@@ -63,7 +62,6 @@ class TestQuestionDirectSubscribers(TestCaseWithFactory):
 
 
 class TestQuestionInDirectSubscribers(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_answerContactIsIndirectSubscriber(self):
@@ -108,7 +106,6 @@ class TestQuestionInDirectSubscribers(TestCaseWithFactory):
 
 
 class TestQuestionSet(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_expiredQuestions(self):
diff --git a/lib/lp/answers/publisher.py b/lib/lp/answers/publisher.py
index 21d1443..6e61444 100644
--- a/lib/lp/answers/publisher.py
+++ b/lib/lp/answers/publisher.py
@@ -24,7 +24,6 @@ from lp.services.webapp.servers import (
 
 @implementer(IFacet)
 class AnswersFacet:
-
     name = "answers"
     rootsite = "answers"
     text = "Questions"
diff --git a/lib/lp/answers/tests/test_faq.py b/lib/lp/answers/tests/test_faq.py
index 020cbaa..a50a432 100644
--- a/lib/lp/answers/tests/test_faq.py
+++ b/lib/lp/answers/tests/test_faq.py
@@ -106,7 +106,6 @@ class TestFAQPermissions(TestCaseWithFactory):
 
 
 class TestFAQ(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_destroySelf(self):
diff --git a/lib/lp/answers/tests/test_faq_webservice.py b/lib/lp/answers/tests/test_faq_webservice.py
index bb69f3e..dc80564 100644
--- a/lib/lp/answers/tests/test_faq_webservice.py
+++ b/lib/lp/answers/tests/test_faq_webservice.py
@@ -13,7 +13,6 @@ from lp.testing.pages import webservice_for_person
 
 
 class TestFAQWebService(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_representation(self):
diff --git a/lib/lp/answers/tests/test_question.py b/lib/lp/answers/tests/test_question.py
index 8e22dbd..29adfe5 100644
--- a/lib/lp/answers/tests/test_question.py
+++ b/lib/lp/answers/tests/test_question.py
@@ -19,7 +19,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestQuestionSecurity(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_title_and_description_writes(self):
diff --git a/lib/lp/answers/tests/test_question_webservice.py b/lib/lp/answers/tests/test_question_webservice.py
index a5735b2..9378638 100644
--- a/lib/lp/answers/tests/test_question_webservice.py
+++ b/lib/lp/answers/tests/test_question_webservice.py
@@ -275,7 +275,6 @@ class TestSetCommentVisibility(TestCaseWithFactory):
 
 
 class TestQuestionWebServiceSubscription(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_subscribe(self):
@@ -325,7 +324,6 @@ class TestQuestionWebServiceSubscription(TestCaseWithFactory):
 
 
 class TestQuestionSetWebService(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_searchQuestions(self):
diff --git a/lib/lp/answers/tests/test_question_workflow.py b/lib/lp/answers/tests/test_question_workflow.py
index 733e24e..c0e61ce 100644
--- a/lib/lp/answers/tests/test_question_workflow.py
+++ b/lib/lp/answers/tests/test_question_workflow.py
@@ -612,6 +612,7 @@ class LinkFAQTestCase(BaseAnswerTrackerWorkflowTestCase):
         one of OPEN, NEEDSINFO or ANSWERED and check that it returns a
         valid IQuestionMessage.
         """
+
         # Do not check the edited_fields attributes since it
         # changes based on departure state.
         def checkFAQ(message):
diff --git a/lib/lp/app/browser/launchpad.py b/lib/lp/app/browser/launchpad.py
index a4eba0a..25b5c11 100644
--- a/lib/lp/app/browser/launchpad.py
+++ b/lib/lp/app/browser/launchpad.py
@@ -565,7 +565,6 @@ class MaintenanceMessage:
 
 
 class LaunchpadRootFacets(StandardLaunchpadFacets):
-
     usedfor = ILaunchpadRoot
     enable_only = [
         "overview",
@@ -689,7 +688,6 @@ class LoginStatus:
 
 
 class LaunchpadRootNavigation(Navigation):
-
     usedfor = ILaunchpadRoot
 
     @stepto("support")
@@ -1185,7 +1183,6 @@ class IAppFrontPageSearchForm(Interface):
 
 
 class AppFrontPageSearchView(LaunchpadFormView):
-
     schema = IAppFrontPageSearchForm
     custom_widget_scope = ProjectScopeWidget
 
diff --git a/lib/lp/app/browser/launchpadform.py b/lib/lp/app/browser/launchpadform.py
index 3578008..119bace 100644
--- a/lib/lp/app/browser/launchpadform.py
+++ b/lib/lp/app/browser/launchpadform.py
@@ -57,7 +57,6 @@ _first_widget_marker = object()
 
 
 class LaunchpadFormView(LaunchpadView):
-
     # The prefix used for all form inputs.
     prefix = "field"
 
@@ -472,7 +471,6 @@ class LaunchpadFormView(LaunchpadView):
 
 
 class LaunchpadEditFormView(LaunchpadFormView):
-
     render_context = True
 
     def updateContextFromData(self, data, context=None, notify_modified=True):
diff --git a/lib/lp/app/browser/tales.py b/lib/lp/app/browser/tales.py
index 44781e8..b8584c9 100644
--- a/lib/lp/app/browser/tales.py
+++ b/lib/lp/app/browser/tales.py
@@ -1053,7 +1053,6 @@ class SpecificationImageDisplayAPI(ObjectImageDisplayAPI):
         return '<span class="%s"></span>' % self.sprite_css()
 
     def badges(self):
-
         badges = ""
 
         if len(self._context.linked_branches) > 0:
@@ -1778,7 +1777,6 @@ class BranchSubscriptionFormatterAPI(CustomizableFormatter):
 
 
 class BranchMergeProposalFormatterAPI(CustomizableFormatter):
-
     _link_summary_template = _("%(title)s")
 
     def _link_summary_values(self):
@@ -1858,7 +1856,6 @@ class BugTaskFormatterAPI(CustomizableFormatter):
 
 
 class BugAttachmentFormatterAPI(CustomizableFormatter):
-
     final_traversable_names = dict(
         **CustomizableFormatter.final_traversable_names,
         attachment_link="attachment_link",
diff --git a/lib/lp/app/browser/tests/test_css_formatter.py b/lib/lp/app/browser/tests/test_css_formatter.py
index c60af07..0cade3f 100644
--- a/lib/lp/app/browser/tests/test_css_formatter.py
+++ b/lib/lp/app/browser/tests/test_css_formatter.py
@@ -10,7 +10,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestCSSFormatter(TestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_select(self):
diff --git a/lib/lp/app/browser/tests/test_formatters.py b/lib/lp/app/browser/tests/test_formatters.py
index b659677..c7eab52 100644
--- a/lib/lp/app/browser/tests/test_formatters.py
+++ b/lib/lp/app/browser/tests/test_formatters.py
@@ -11,7 +11,6 @@ from lp.testing.views import create_view
 
 
 class ObjectFormatterAPITestCase(TestCaseWithFactory, FakeAdapterMixin):
-
     layer = DatabaseFunctionalLayer
 
     def test_pagetitle_top_level(self):
@@ -109,7 +108,6 @@ class ObjectFormatterAPITestCase(TestCaseWithFactory, FakeAdapterMixin):
 
 
 class TestPillarFormatterAPI(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     FORMATTER_CSS_CLASS = "sprite product"
diff --git a/lib/lp/app/browser/tests/test_inlineeditpickerwidget.py b/lib/lp/app/browser/tests/test_inlineeditpickerwidget.py
index c6fe5c9..4411353 100644
--- a/lib/lp/app/browser/tests/test_inlineeditpickerwidget.py
+++ b/lib/lp/app/browser/tests/test_inlineeditpickerwidget.py
@@ -15,7 +15,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestInlineEditPickerWidget(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def getWidget(self, **kwargs):
@@ -65,7 +64,6 @@ class TestInlineEditPickerWidget(TestCaseWithFactory):
 
 
 class TestInlinePersonEditPickerWidget(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def getWidget(self, widget_value, show_create_team=False, **kwargs):
diff --git a/lib/lp/app/browser/tests/test_inlinemulticheckboxwidget.py b/lib/lp/app/browser/tests/test_inlinemulticheckboxwidget.py
index 3222fa4..205640d 100644
--- a/lib/lp/app/browser/tests/test_inlinemulticheckboxwidget.py
+++ b/lib/lp/app/browser/tests/test_inlinemulticheckboxwidget.py
@@ -25,7 +25,6 @@ class Alphabet(EnumeratedType):
 
 
 class TestInlineMultiCheckboxWidget(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def _getWidget(self, **kwargs):
diff --git a/lib/lp/app/browser/tests/test_launchpad.py b/lib/lp/app/browser/tests/test_launchpad.py
index 72605c3..e7cd7d9 100644
--- a/lib/lp/app/browser/tests/test_launchpad.py
+++ b/lib/lp/app/browser/tests/test_launchpad.py
@@ -347,7 +347,6 @@ class TestBranchTraversal(TestCaseWithFactory, TraversalMixin):
 
 
 class TestCodeTraversal(TestCaseWithFactory, TraversalMixin):
-
     layer = DatabaseFunctionalLayer
 
     def traverse(self, path, **kwargs):
@@ -606,7 +605,6 @@ class TestCodeTraversal(TestCaseWithFactory, TraversalMixin):
 
 
 class TestPersonTraversal(TestCaseWithFactory, TraversalMixin):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -720,7 +718,6 @@ class TestPersonTraversal(TestCaseWithFactory, TraversalMixin):
 
 
 class TestErrorViews(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_GoneError(self):
@@ -731,7 +728,6 @@ class TestErrorViews(TestCaseWithFactory):
 
 
 class ExceptionHierarchyTestCase(TestCaseWithFactory):
-
     layer = FunctionalLayer
 
     def test_exception(self):
@@ -751,7 +747,6 @@ class ExceptionHierarchyTestCase(TestCaseWithFactory):
 
 
 class TestIterViewRegistrations(TestCaseWithFactory):
-
     layer = FunctionalLayer
 
     def test_iter_view_registrations(self):
@@ -765,7 +760,6 @@ class TestIterViewRegistrations(TestCaseWithFactory):
 
 
 class TestProductTraversal(TestCaseWithFactory, TraversalMixin):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/app/browser/tests/test_launchpadform.py b/lib/lp/app/browser/tests/test_launchpadform.py
index 7ca3863..ff3aea2 100644
--- a/lib/lp/app/browser/tests/test_launchpadform.py
+++ b/lib/lp/app/browser/tests/test_launchpadform.py
@@ -38,7 +38,6 @@ class TestView(LaunchpadFormView):
 
 
 class TestHasStructuredDoc(TestCase):
-
     layer = FunctionalLayer
 
     def _widget_annotation(self, widget):
@@ -55,7 +54,6 @@ class TestHasStructuredDoc(TestCase):
 
 
 class TestQueryTalesForHasStructuredDoc(TestCase):
-
     layer = FunctionalLayer
 
     def test_query_tales(self):
@@ -102,7 +100,6 @@ class TestHelpLinksView(LaunchpadFormView):
 
 
 class TestHelpLinks(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_help_links_on_widget(self):
diff --git a/lib/lp/app/browser/tests/test_launchpadform_doc.py b/lib/lp/app/browser/tests/test_launchpadform_doc.py
index 5e679ab..461df86 100644
--- a/lib/lp/app/browser/tests/test_launchpadform_doc.py
+++ b/lib/lp/app/browser/tests/test_launchpadform_doc.py
@@ -17,7 +17,6 @@ from lp.testing.layers import FunctionalLayer
 
 
 class LaunchpadFormTest(unittest.TestCase):
-
     layer = FunctionalLayer
 
     def test_formLayout(self):
diff --git a/lib/lp/app/browser/tests/test_launchpadroot.py b/lib/lp/app/browser/tests/test_launchpadroot.py
index c5e5329..85faf0a 100644
--- a/lib/lp/app/browser/tests/test_launchpadroot.py
+++ b/lib/lp/app/browser/tests/test_launchpadroot.py
@@ -127,7 +127,6 @@ class TestLaunchpadRootNavigation(TestCaseWithFactory):
 
 
 class LaunchpadRootIndexViewTestCase(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/app/browser/tests/test_linkchecker.py b/lib/lp/app/browser/tests/test_linkchecker.py
index 0215c41..f1b2fe9 100644
--- a/lib/lp/app/browser/tests/test_linkchecker.py
+++ b/lib/lp/app/browser/tests/test_linkchecker.py
@@ -16,7 +16,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestLinkCheckerAPI(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     BRANCH_URL_TEMPLATE = "/+code/%s"
diff --git a/lib/lp/app/browser/tests/test_stringformatter.py b/lib/lp/app/browser/tests/test_stringformatter.py
index d8f556e..78a332f 100644
--- a/lib/lp/app/browser/tests/test_stringformatter.py
+++ b/lib/lp/app/browser/tests/test_stringformatter.py
@@ -167,7 +167,6 @@ class TestLinkifyingBugs(TestCase):
 
 
 class TestLinkifyingProtocols(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_normal_set(self):
@@ -484,7 +483,6 @@ class TestParseDiff(TestCase):
 
 
 class TestParseDiffErrors(TestCaseWithFactory):
-
     layer = ZopelessLayer
 
     def assertParses(self, expected, diff):
diff --git a/lib/lp/app/browser/tests/test_vocabulary.py b/lib/lp/app/browser/tests/test_vocabulary.py
index c827743..81f80cf 100644
--- a/lib/lp/app/browser/tests/test_vocabulary.py
+++ b/lib/lp/app/browser/tests/test_vocabulary.py
@@ -44,7 +44,6 @@ def get_picker_entry(item_subject, context_object, **kwargs):
 
 
 class DefaultPickerEntrySourceAdapterTestCase(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_css_image_entry_without_icon(self):
@@ -74,7 +73,6 @@ class DefaultPickerEntrySourceAdapterTestCase(TestCaseWithFactory):
 
 
 class PersonPickerEntrySourceAdapterTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_person_to_pickerentry(self):
@@ -190,7 +188,6 @@ class PersonPickerEntrySourceAdapterTestCase(TestCaseWithFactory):
 class TestDistributionSourcePackagePickerEntrySourceAdapter(
     TestCaseWithFactory
 ):
-
     layer = DatabaseFunctionalLayer
 
     def getPickerEntry(self, dsp):
@@ -270,7 +267,6 @@ class TestDistributionSourcePackagePickerEntrySourceAdapter(
 
 
 class TestProductPickerEntrySourceAdapter(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def getPickerEntry(self, product):
@@ -352,7 +348,6 @@ class TestProductPickerEntrySourceAdapter(TestCaseWithFactory):
 
 
 class TestProjectGroupPickerEntrySourceAdapter(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def getPickerEntry(self, projectgroup):
@@ -410,7 +405,6 @@ class TestProjectGroupPickerEntrySourceAdapter(TestCaseWithFactory):
 
 
 class TestDistributionPickerEntrySourceAdapter(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def getPickerEntry(self, distribution):
@@ -544,7 +538,6 @@ class TestVocabularyFilter(VocabularyFilter):
 
 
 class HugeVocabularyJSONViewTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/app/browser/tests/test_webservice.py b/lib/lp/app/browser/tests/test_webservice.py
index b1f72ad..2defa9d 100644
--- a/lib/lp/app/browser/tests/test_webservice.py
+++ b/lib/lp/app/browser/tests/test_webservice.py
@@ -15,7 +15,6 @@ from lp.testing.pages import LaunchpadWebServiceCaller
 
 
 class TestXHTMLRepresentations(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_person(self):
diff --git a/lib/lp/app/browser/vocabulary.py b/lib/lp/app/browser/vocabulary.py
index 04d0599..0d0283f 100644
--- a/lib/lp/app/browser/vocabulary.py
+++ b/lib/lp/app/browser/vocabulary.py
@@ -377,7 +377,6 @@ class ProductPickerEntrySourceAdapter(TargetPickerEntrySourceAdapter):
 
 @adapter(IDistribution)
 class DistributionPickerEntrySourceAdapter(TargetPickerEntrySourceAdapter):
-
     target_type = "distribution"
 
     def getMaintainer(self, target):
diff --git a/lib/lp/app/interfaces/informationtype.py b/lib/lp/app/interfaces/informationtype.py
index 5ea95df..29bc077 100644
--- a/lib/lp/app/interfaces/informationtype.py
+++ b/lib/lp/app/interfaces/informationtype.py
@@ -14,7 +14,6 @@ from lp.app.interfaces.launchpad import IPrivacy
 
 
 class IInformationType(IPrivacy):
-
     information_type = exported(
         Choice(
             title=_("Information Type"),
diff --git a/lib/lp/app/tests/test_launchpad.py b/lib/lp/app/tests/test_launchpad.py
index 506f6ab..5a47167 100644
--- a/lib/lp/app/tests/test_launchpad.py
+++ b/lib/lp/app/tests/test_launchpad.py
@@ -16,7 +16,6 @@ from lp.testing.layers import FunctionalLayer
 
 
 class PrivacyTestCase(TestCase):
-
     layer = FunctionalLayer
 
     def test_init(self):
@@ -29,7 +28,6 @@ class PrivacyTestCase(TestCase):
 
 
 class ExceptionPrivacyTestCase(TestCase):
-
     layer = FunctionalLayer
 
     def test_exception(self):
diff --git a/lib/lp/app/tests/test_security.py b/lib/lp/app/tests/test_security.py
index 384fda1..0f70c4f 100644
--- a/lib/lp/app/tests/test_security.py
+++ b/lib/lp/app/tests/test_security.py
@@ -47,7 +47,6 @@ class Fake:
 
 
 class TestAuthorizationBase(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_checkAuthenticated_for_full_fledged_account(self):
diff --git a/lib/lp/app/tests/test_services.py b/lib/lp/app/tests/test_services.py
index 76ac515..f84bbda 100644
--- a/lib/lp/app/tests/test_services.py
+++ b/lib/lp/app/tests/test_services.py
@@ -25,7 +25,6 @@ class IFakeService(IService):
 
 @implementer(IFakeService, IHTTPResource)
 class FakeService:
-
     name = "fake_service"
 
 
diff --git a/lib/lp/app/tests/test_yuitests.py b/lib/lp/app/tests/test_yuitests.py
index 1f8537f..cfa0a8e 100644
--- a/lib/lp/app/tests/test_yuitests.py
+++ b/lib/lp/app/tests/test_yuitests.py
@@ -11,7 +11,6 @@ __all__ = []  # type: List[str]
 
 
 class AppYUIUnitTestCase(YUIUnitTestCase):
-
     layer = YUITestLayer
     suite_name = "AppYUIUnitTests"
 
diff --git a/lib/lp/app/validators/tests/test_validation.py b/lib/lp/app/validators/tests/test_validation.py
index 3b14319..6d5c31c 100644
--- a/lib/lp/app/validators/tests/test_validation.py
+++ b/lib/lp/app/validators/tests/test_validation.py
@@ -9,7 +9,6 @@ from lp.testing.layers import BaseLayer
 
 
 class TestOCIBranchValidator(TestCase):
-
     layer = BaseLayer
 
     def test_validate_oci_branch_name_with_leading_slash(self):
diff --git a/lib/lp/app/webservice/tests/test_marshallers.py b/lib/lp/app/webservice/tests/test_marshallers.py
index cd5def4..006a1bd 100644
--- a/lib/lp/app/webservice/tests/test_marshallers.py
+++ b/lib/lp/app/webservice/tests/test_marshallers.py
@@ -29,7 +29,6 @@ def ws_url(bug):
 
 
 class TestTextFieldMarshaller(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_unmarshall_obfuscated(self):
@@ -138,7 +137,6 @@ class TestWebServiceObfuscation(TestCaseWithFactory):
 
 
 class IInlineExample(Interface):
-
     person = PersonChoice(vocabulary="ValidPersonOrTeam")
 
     status = Choice(vocabulary=JobStatus)
@@ -158,7 +156,6 @@ def inline_example_from_dict(template):
 
 
 class TestInlineObjectFieldMarshaller(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_unmarshall(self):
diff --git a/lib/lp/app/widgets/date.py b/lib/lp/app/widgets/date.py
index ce27881..a54e85f 100644
--- a/lib/lp/app/widgets/date.py
+++ b/lib/lp/app/widgets/date.py
@@ -364,7 +364,7 @@ class DateTimeWidget(TextWidget):
         for fmt in self.supported_input_formats:
             try:
                 datetime.strptime(input.strip(), fmt)
-            except (ValueError) as e:
+            except ValueError as e:
                 if "unconverted data remains" in str(e):
                     return
                 else:
diff --git a/lib/lp/app/widgets/popup.py b/lib/lp/app/widgets/popup.py
index b2524ef..0f443f0 100644
--- a/lib/lp/app/widgets/popup.py
+++ b/lib/lp/app/widgets/popup.py
@@ -243,7 +243,6 @@ class VocabularyPickerWidget(SingleDataHelper, ItemsWidgetBase):
 
 
 class PersonPickerWidget(VocabularyPickerWidget):
-
     show_assign_me_button = True
     show_remove_button = False
     picker_type = "person"
@@ -267,7 +266,6 @@ class PersonPickerWidget(VocabularyPickerWidget):
 
 
 class BugTrackerPickerWidget(VocabularyPickerWidget):
-
     __call__ = ViewPageTemplateFile("templates/bugtracker-picker.pt")
     link_template = """
         or (<a id="create-bugtracker-link"
diff --git a/lib/lp/app/widgets/snapbuildchannels.py b/lib/lp/app/widgets/snapbuildchannels.py
index d1da50b..c2a9172 100644
--- a/lib/lp/app/widgets/snapbuildchannels.py
+++ b/lib/lp/app/widgets/snapbuildchannels.py
@@ -24,7 +24,6 @@ from lp.services.webapp.interfaces import (
 
 @implementer(ISingleLineWidgetLayout, IAlwaysSubmittedWidget, IInputWidget)
 class SnapBuildChannelsWidget(BrowserWidget, InputWidget):
-
     template = ViewPageTemplateFile("templates/snapbuildchannels.pt")
     hint = False
     _widgets_set_up = False
diff --git a/lib/lp/app/widgets/tests/test_datetime.py b/lib/lp/app/widgets/tests/test_datetime.py
index a6b39e9..0ae5ab8 100644
--- a/lib/lp/app/widgets/tests/test_datetime.py
+++ b/lib/lp/app/widgets/tests/test_datetime.py
@@ -13,7 +13,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestDateTimeWidget(TestCase):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/app/widgets/tests/test_itemswidgets.py b/lib/lp/app/widgets/tests/test_itemswidgets.py
index 57bdae9..4a604b9 100644
--- a/lib/lp/app/widgets/tests/test_itemswidgets.py
+++ b/lib/lp/app/widgets/tests/test_itemswidgets.py
@@ -278,7 +278,6 @@ class TestEnumChoiceWidget(TestCaseWithFactory):
     layer = DatabaseFunctionalLayer
 
     class ChoiceEnum(DBEnumeratedType):
-
         ITEM_A = DBItem(
             1,
             """
diff --git a/lib/lp/app/widgets/tests/test_popup.py b/lib/lp/app/widgets/tests/test_popup.py
index 0a4ce99..214e3a1 100644
--- a/lib/lp/app/widgets/tests/test_popup.py
+++ b/lib/lp/app/widgets/tests/test_popup.py
@@ -44,7 +44,6 @@ class ITest(Interface, metaclass=TestMetaClass):
 
 
 class TestVocabularyPickerWidget(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/app/widgets/tests/test_snapbuildchannels.py b/lib/lp/app/widgets/tests/test_snapbuildchannels.py
index 27462a7..107c023 100644
--- a/lib/lp/app/widgets/tests/test_snapbuildchannels.py
+++ b/lib/lp/app/widgets/tests/test_snapbuildchannels.py
@@ -14,7 +14,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestSnapBuildChannelsWidget(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/archivepublisher/customupload.py b/lib/lp/archivepublisher/customupload.py
index 533e488..2759c2f 100644
--- a/lib/lp/archivepublisher/customupload.py
+++ b/lib/lp/archivepublisher/customupload.py
@@ -315,7 +315,6 @@ class CustomUpload:
         assert self.tmpdir is not None, "Must extract tarfile first"
         extracted = False
         for dirpath, dirnames, filenames in os.walk(self.tmpdir):
-
             # Create symbolic links to directories.
             for dirname in dirnames:
                 sourcepath, basepath, destpath = self._buildInstallPaths(
diff --git a/lib/lp/archivepublisher/debversion.py b/lib/lp/archivepublisher/debversion.py
index ddbecd9..cd409b4 100644
--- a/lib/lp/archivepublisher/debversion.py
+++ b/lib/lp/archivepublisher/debversion.py
@@ -55,7 +55,6 @@ class Version(changelog.Version):
     """
 
     def __init__(self, ver):
-
         ver = str(ver)
         if not len(ver):
             raise BadInputError("Input cannot be empty")
diff --git a/lib/lp/archivepublisher/model/ftparchive.py b/lib/lp/archivepublisher/model/ftparchive.py
index a891a85..ba801ae 100644
--- a/lib/lp/archivepublisher/model/ftparchive.py
+++ b/lib/lp/archivepublisher/model/ftparchive.py
@@ -889,7 +889,6 @@ class FTPArchiveHandler:
         # each of the distroseries we've touched
         for distroseries in self.distro.series:
             for pocket in PackagePublishingPocket.items:
-
                 if not fullpublish:
                     if not self.publisher.isDirty(distroseries, pocket):
                         self.log.debug(
diff --git a/lib/lp/archivepublisher/publishing.py b/lib/lp/archivepublisher/publishing.py
index 105a393..8eee4ed 100644
--- a/lib/lp/archivepublisher/publishing.py
+++ b/lib/lp/archivepublisher/publishing.py
@@ -1882,10 +1882,10 @@ class DirectoryHash:
         ]
         with open(path, "rb") as in_file:
             for chunk in iter(lambda: in_file.read(256 * 1024), b""):
-                for (checksum_file, hashobj) in hashes:
+                for checksum_file, hashobj in hashes:
                     hashobj.update(chunk)
 
-        for (checksum_file, hashobj) in hashes:
+        for checksum_file, hashobj in hashes:
             checksum_line = "%s *%s\n" % (
                 hashobj.hexdigest(),
                 path[len(self.root) + 1 :],
@@ -1899,5 +1899,5 @@ class DirectoryHash:
                 self.add(os.path.join(dirpath, filename))
 
     def close(self):
-        for (checksum_path, checksum_file, archive_hash) in self.checksum_hash:
+        for checksum_path, checksum_file, archive_hash in self.checksum_hash:
             checksum_file.close()
diff --git a/lib/lp/archivepublisher/scripts/copy_signingkeys.py b/lib/lp/archivepublisher/scripts/copy_signingkeys.py
index 018b7aa..54b829b 100644
--- a/lib/lp/archivepublisher/scripts/copy_signingkeys.py
+++ b/lib/lp/archivepublisher/scripts/copy_signingkeys.py
@@ -20,7 +20,6 @@ from lp.soyuz.interfaces.archive import IArchiveSet
 
 
 class CopySigningKeysScript(LaunchpadScript):
-
     usage = "Usage: %prog [options] FROM_ARCHIVE TO_ARCHIVE"
     description = "Copy signing keys between archives."
 
diff --git a/lib/lp/archivepublisher/scripts/generate_contents_files.py b/lib/lp/archivepublisher/scripts/generate_contents_files.py
index e4c25e5..bd4f5e3 100644
--- a/lib/lp/archivepublisher/scripts/generate_contents_files.py
+++ b/lib/lp/archivepublisher/scripts/generate_contents_files.py
@@ -99,7 +99,6 @@ def execute(logger, command, args=None):
 
 
 class GenerateContentsFiles(LaunchpadCronScript):
-
     distribution = None
 
     def add_my_options(self):
diff --git a/lib/lp/archivepublisher/scripts/processaccepted.py b/lib/lp/archivepublisher/scripts/processaccepted.py
index 10f90f7..da27fb9 100644
--- a/lib/lp/archivepublisher/scripts/processaccepted.py
+++ b/lib/lp/archivepublisher/scripts/processaccepted.py
@@ -128,7 +128,6 @@ class ProcessAccepted(PublisherScript):
             )
             try:
                 for distroseries in distribution.series:
-
                     self.logger.debug(
                         "Processing queue for %s %s"
                         % (archive.reference, distroseries.name)
diff --git a/lib/lp/archivepublisher/tests/test_archivegpgsigningkey.py b/lib/lp/archivepublisher/tests/test_archivegpgsigningkey.py
index e4832f4..e51077a 100644
--- a/lib/lp/archivepublisher/tests/test_archivegpgsigningkey.py
+++ b/lib/lp/archivepublisher/tests/test_archivegpgsigningkey.py
@@ -50,7 +50,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestSignableArchiveWithSigningKey(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
     run_tests_with = AsynchronousDeferredRunTest.make_factory(timeout=30)
 
@@ -223,7 +222,6 @@ class TestSignableArchiveWithSigningKey(TestCaseWithFactory):
 
 
 class TestSignableArchiveWithRunParts(RunPartsMixin, TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -352,7 +350,6 @@ class TestSignableArchiveWithRunParts(RunPartsMixin, TestCaseWithFactory):
 
 
 class TestArchiveGPGSigningKey(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
     # treq.content doesn't close the connection before yielding control back
     # to the test, so we need to spin the reactor at the end to finish
diff --git a/lib/lp/archivepublisher/tests/test_artifactory.py b/lib/lp/archivepublisher/tests/test_artifactory.py
index d91898e..d13a92d 100644
--- a/lib/lp/archivepublisher/tests/test_artifactory.py
+++ b/lib/lp/archivepublisher/tests/test_artifactory.py
@@ -69,7 +69,6 @@ class ArtifactoryPoolTestingFile(PoolTestingFile):
 
 
 class TestArtifactoryPool(TestCase):
-
     layer = BaseLayer
 
     def setUp(self):
@@ -492,7 +491,6 @@ class TestArtifactoryPool(TestCase):
 
 
 class TestArtifactoryPoolFromLibrarian(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
diff --git a/lib/lp/archivepublisher/tests/test_config.py b/lib/lp/archivepublisher/tests/test_config.py
index dd85b75..a25accd 100644
--- a/lib/lp/archivepublisher/tests/test_config.py
+++ b/lib/lp/archivepublisher/tests/test_config.py
@@ -27,7 +27,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestGetPubConfig(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -143,7 +142,6 @@ class TestGetPubConfig(TestCaseWithFactory):
 
 
 class TestGetPubConfigPPA(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -252,7 +250,6 @@ class TestGetPubConfigPPA(TestCaseWithFactory):
 
 
 class TestGetPubConfigPPACompatUefi(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -275,7 +272,6 @@ class TestGetPubConfigPPACompatUefi(TestCaseWithFactory):
 
 
 class TestGetPubConfigPPARepositoryFormatPython(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
diff --git a/lib/lp/archivepublisher/tests/test_copy_signingkeys.py b/lib/lp/archivepublisher/tests/test_copy_signingkeys.py
index a31e85e..a2d5364 100644
--- a/lib/lp/archivepublisher/tests/test_copy_signingkeys.py
+++ b/lib/lp/archivepublisher/tests/test_copy_signingkeys.py
@@ -21,7 +21,6 @@ from lp.testing.script import run_script
 
 
 class TestCopySigningKeysScript(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def makeScript(self, test_args=None, archives=None, expect_exit=False):
diff --git a/lib/lp/archivepublisher/tests/test_customupload.py b/lib/lp/archivepublisher/tests/test_customupload.py
index f077874..7a22882 100644
--- a/lib/lp/archivepublisher/tests/test_customupload.py
+++ b/lib/lp/archivepublisher/tests/test_customupload.py
@@ -216,7 +216,6 @@ class TestTarfileVerification(TestCase):
 
 
 class TestSigning(TestCaseWithFactory, RunPartsMixin):
-
     layer = LaunchpadZopelessLayer
     run_tests_with = AsynchronousDeferredRunTest.make_factory(timeout=30)
 
diff --git a/lib/lp/archivepublisher/tests/test_ddtp_tarball.py b/lib/lp/archivepublisher/tests/test_ddtp_tarball.py
index 873d22f..f2c4812 100644
--- a/lib/lp/archivepublisher/tests/test_ddtp_tarball.py
+++ b/lib/lp/archivepublisher/tests/test_ddtp_tarball.py
@@ -21,7 +21,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestDdtpTarball(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
diff --git a/lib/lp/archivepublisher/tests/test_deathrow.py b/lib/lp/archivepublisher/tests/test_deathrow.py
index 77bcf8b..f2d9ff1 100644
--- a/lib/lp/archivepublisher/tests/test_deathrow.py
+++ b/lib/lp/archivepublisher/tests/test_deathrow.py
@@ -20,7 +20,6 @@ from lp.testing.layers import LaunchpadZopelessLayer
 
 
 class TestDeathRow(TestCase):
-
     layer = LaunchpadZopelessLayer
 
     def getTestPublisher(self, distroseries):
diff --git a/lib/lp/archivepublisher/tests/test_debian_installer.py b/lib/lp/archivepublisher/tests/test_debian_installer.py
index a41785e..b04619c 100644
--- a/lib/lp/archivepublisher/tests/test_debian_installer.py
+++ b/lib/lp/archivepublisher/tests/test_debian_installer.py
@@ -28,7 +28,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestDebianInstaller(RunPartsMixin, TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
diff --git a/lib/lp/archivepublisher/tests/test_dist_upgrader.py b/lib/lp/archivepublisher/tests/test_dist_upgrader.py
index 1584d60..ace7cdb 100644
--- a/lib/lp/archivepublisher/tests/test_dist_upgrader.py
+++ b/lib/lp/archivepublisher/tests/test_dist_upgrader.py
@@ -31,7 +31,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestDistUpgrader(RunPartsMixin, TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
diff --git a/lib/lp/archivepublisher/tests/test_dominator.py b/lib/lp/archivepublisher/tests/test_dominator.py
index e689f3c..7c9e7ad 100644
--- a/lib/lp/archivepublisher/tests/test_dominator.py
+++ b/lib/lp/archivepublisher/tests/test_dominator.py
@@ -939,7 +939,6 @@ def jumble(ordered_list):
 
 
 class TestDominatorMethods(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def makeDominator(self, publications):
diff --git a/lib/lp/archivepublisher/tests/test_indices.py b/lib/lp/archivepublisher/tests/test_indices.py
index e1dcfda..1397ffd 100644
--- a/lib/lp/archivepublisher/tests/test_indices.py
+++ b/lib/lp/archivepublisher/tests/test_indices.py
@@ -39,7 +39,6 @@ def get_field(stanza_fields, name):
 
 
 class TestNativeArchiveIndexes(TestNativePublishingBase):
-
     deb_md5 = "008409e7feb1c24a6ccab9f6a62d24c5"
     deb_sha1 = "30b7b4e583fa380772c5a40e428434628faef8cf"
     deb_sha256 = (
diff --git a/lib/lp/archivepublisher/tests/test_meta_data.py b/lib/lp/archivepublisher/tests/test_meta_data.py
index f3a93ba..e7beb8f 100644
--- a/lib/lp/archivepublisher/tests/test_meta_data.py
+++ b/lib/lp/archivepublisher/tests/test_meta_data.py
@@ -18,7 +18,6 @@ from lp.testing.layers import LaunchpadZopelessLayer
 
 
 class TestMetaData(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def test_ubuntu_ppa(self):
diff --git a/lib/lp/archivepublisher/tests/test_pool.py b/lib/lp/archivepublisher/tests/test_pool.py
index 1329e34..64e0890 100644
--- a/lib/lp/archivepublisher/tests/test_pool.py
+++ b/lib/lp/archivepublisher/tests/test_pool.py
@@ -72,7 +72,6 @@ class FakePackageRelease:
 
 
 class FakeReleaseType(EnumeratedType):
-
     SOURCE = Item("Source")
     BINARY = Item("Binary")
 
diff --git a/lib/lp/archivepublisher/tests/test_processaccepted.py b/lib/lp/archivepublisher/tests/test_processaccepted.py
index 96afe95..34c459e 100644
--- a/lib/lp/archivepublisher/tests/test_processaccepted.py
+++ b/lib/lp/archivepublisher/tests/test_processaccepted.py
@@ -26,7 +26,6 @@ from lp.testing.layers import LaunchpadZopelessLayer
 
 
 class TestProcessAccepted(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
     dbuser = config.uploadqueue.dbuser
 
@@ -175,7 +174,6 @@ class TestProcessAccepted(TestCaseWithFactory):
         ]
 
         class UploadCheckingSynchronizer:
-
             commit_count = 0
 
             def beforeCompletion(inner_self, txn):
diff --git a/lib/lp/archivepublisher/tests/test_publisherconfig.py b/lib/lp/archivepublisher/tests/test_publisherconfig.py
index 4907178..7966d8b 100644
--- a/lib/lp/archivepublisher/tests/test_publisherconfig.py
+++ b/lib/lp/archivepublisher/tests/test_publisherconfig.py
@@ -70,7 +70,6 @@ class TestPublisherConfig(TestCaseWithFactory):
 
 
 class TestPublisherConfigSecurity(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_only_admin(self):
diff --git a/lib/lp/archivepublisher/tests/test_rosetta_translations.py b/lib/lp/archivepublisher/tests/test_rosetta_translations.py
index ea41b4c..1d8fca7 100644
--- a/lib/lp/archivepublisher/tests/test_rosetta_translations.py
+++ b/lib/lp/archivepublisher/tests/test_rosetta_translations.py
@@ -40,7 +40,6 @@ from lp.translations.model.translationpackagingjob import (
 
 
 class TestRosettaTranslations(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def makeTranslationsLFA(self, tar_content=None, filename=None):
diff --git a/lib/lp/archivepublisher/tests/test_signing.py b/lib/lp/archivepublisher/tests/test_signing.py
index 696053d..547c02f 100644
--- a/lib/lp/archivepublisher/tests/test_signing.py
+++ b/lib/lp/archivepublisher/tests/test_signing.py
@@ -183,7 +183,6 @@ class FakeMethodCallLog(FakeMethod):
 
 
 class TestSigningHelpers(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
     run_tests_with = AsynchronousDeferredRunTest.make_factory(timeout=30)
 
diff --git a/lib/lp/archivepublisher/tests/test_sync_signingkeys.py b/lib/lp/archivepublisher/tests/test_sync_signingkeys.py
index 05a0d24..bf5a5a2 100644
--- a/lib/lp/archivepublisher/tests/test_sync_signingkeys.py
+++ b/lib/lp/archivepublisher/tests/test_sync_signingkeys.py
@@ -52,7 +52,6 @@ from lp.testing.script import run_script
 
 
 class TestSyncSigningKeysScript(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
     run_tests_with = AsynchronousDeferredRunTest.make_factory(timeout=30)
 
diff --git a/lib/lp/archivepublisher/utils.py b/lib/lp/archivepublisher/utils.py
index 6156c2c..18d5f03 100644
--- a/lib/lp/archivepublisher/utils.py
+++ b/lib/lp/archivepublisher/utils.py
@@ -37,7 +37,6 @@ def get_ppa_reference(ppa):
 
 
 class PlainTempFile:
-
     # Enumerated identifier.
     compression_type = IndexCompressionType.UNCOMPRESSED
     # Filename suffix.
diff --git a/lib/lp/archiveuploader/nascentuploadfile.py b/lib/lp/archiveuploader/nascentuploadfile.py
index c7773f0..01b2243 100644
--- a/lib/lp/archiveuploader/nascentuploadfile.py
+++ b/lib/lp/archiveuploader/nascentuploadfile.py
@@ -545,7 +545,6 @@ class BaseBinaryUploadFile(PackageUploadFile):
         policy,
         logger,
     ):
-
         PackageUploadFile.__init__(
             self,
             filepath,
diff --git a/lib/lp/archiveuploader/tests/test_buildinfofile.py b/lib/lp/archiveuploader/tests/test_buildinfofile.py
index b54e4e4..acd0d02 100644
--- a/lib/lp/archiveuploader/tests/test_buildinfofile.py
+++ b/lib/lp/archiveuploader/tests/test_buildinfofile.py
@@ -14,7 +14,6 @@ from lp.testing.layers import LaunchpadZopelessLayer
 
 
 class TestBuildInfoFile(PackageUploadFileTestCase):
-
     layer = LaunchpadZopelessLayer
 
     def getBaseBuildInfo(self):
@@ -54,7 +53,7 @@ class TestBuildInfoFile(PackageUploadFileTestCase):
     def test_properties(self):
         buildinfo = self.getBaseBuildInfo()
         changes = self.getBaseChanges()
-        for (arch, is_sourceful, is_binaryful, is_archindep) in (
+        for arch, is_sourceful, is_binaryful, is_archindep in (
             ("source", True, False, False),
             ("all", False, True, True),
             ("i386", False, True, False),
diff --git a/lib/lp/archiveuploader/tests/test_changesfile.py b/lib/lp/archiveuploader/tests/test_changesfile.py
index 16a4c42..067b6bf 100644
--- a/lib/lp/archiveuploader/tests/test_changesfile.py
+++ b/lib/lp/archiveuploader/tests/test_changesfile.py
@@ -426,7 +426,6 @@ class ChangesFileTests(TestCase):
 
 
 class TestSignatureVerification(TestCase):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
diff --git a/lib/lp/archiveuploader/tests/test_dscfile.py b/lib/lp/archiveuploader/tests/test_dscfile.py
index 23a15ca..e2ddeaf 100644
--- a/lib/lp/archiveuploader/tests/test_dscfile.py
+++ b/lib/lp/archiveuploader/tests/test_dscfile.py
@@ -119,7 +119,6 @@ class FakeChangesFile:
 
 
 class TestDSCFileWithDatabase(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_checkFiles_verifies_additional_hashes(self):
@@ -312,7 +311,6 @@ class BaseTestSourceFileVerification(TestCase):
 
 
 class Test10SourceFormatVerification(BaseTestSourceFileVerification):
-
     format = SourcePackageFormat.FORMAT_1_0
 
     wrong_files_error = (
@@ -378,7 +376,6 @@ class Test10SourceFormatVerification(BaseTestSourceFileVerification):
 
 
 class Test30QuiltSourceFormatVerification(BaseTestSourceFileVerification):
-
     format = SourcePackageFormat.FORMAT_3_0_QUILT
 
     wrong_files_error = (
@@ -428,7 +425,6 @@ class Test30QuiltSourceFormatVerification(BaseTestSourceFileVerification):
 
 
 class Test30NativeSourceFormatVerification(BaseTestSourceFileVerification):
-
     format = SourcePackageFormat.FORMAT_3_0_NATIVE
 
     wrong_files_error = "foo_1.dsc: must have only a tar.*."
diff --git a/lib/lp/archiveuploader/tests/test_nascentupload.py b/lib/lp/archiveuploader/tests/test_nascentupload.py
index 0667e31..4047317 100644
--- a/lib/lp/archiveuploader/tests/test_nascentupload.py
+++ b/lib/lp/archiveuploader/tests/test_nascentupload.py
@@ -120,7 +120,6 @@ class TestOverrideDDEBs(TestMatchDDEBs):
 
 
 class TestNascentUpload(TestCase):
-
     layer = ZopelessDatabaseLayer
 
     def test_hash_mismatch_rejects(self):
diff --git a/lib/lp/archiveuploader/tests/test_nascentuploadfile.py b/lib/lp/archiveuploader/tests/test_nascentuploadfile.py
index 6ddfadc..0de2157 100644
--- a/lib/lp/archiveuploader/tests/test_nascentuploadfile.py
+++ b/lib/lp/archiveuploader/tests/test_nascentuploadfile.py
@@ -79,7 +79,6 @@ class NascentUploadFileTestCase(TestCaseWithFactory):
 
 
 class TestNascentUploadFile(NascentUploadFileTestCase):
-
     layer = ZopelessDatabaseLayer
 
     def test_checkSizeAndCheckSum_validates_size(self):
diff --git a/lib/lp/archiveuploader/tests/test_private_maintainers.py b/lib/lp/archiveuploader/tests/test_private_maintainers.py
index 7576d2c..00cf378 100644
--- a/lib/lp/archiveuploader/tests/test_private_maintainers.py
+++ b/lib/lp/archiveuploader/tests/test_private_maintainers.py
@@ -9,7 +9,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestPrivateMaintainers(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_private_team_maintainer(self):
diff --git a/lib/lp/archiveuploader/tests/test_sync_notification.py b/lib/lp/archiveuploader/tests/test_sync_notification.py
index 7e5ca9f..e1fd5ee 100644
--- a/lib/lp/archiveuploader/tests/test_sync_notification.py
+++ b/lib/lp/archiveuploader/tests/test_sync_notification.py
@@ -53,7 +53,6 @@ class FakeChangesFile:
 
 
 class TestSyncNotification(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def makePersonWithEmail(self):
diff --git a/lib/lp/archiveuploader/tests/test_uploadpolicy.py b/lib/lp/archiveuploader/tests/test_uploadpolicy.py
index 042901f..71dd315 100644
--- a/lib/lp/archiveuploader/tests/test_uploadpolicy.py
+++ b/lib/lp/archiveuploader/tests/test_uploadpolicy.py
@@ -146,7 +146,6 @@ class TestUploadPolicy_validateUploadType(TestCase):
 
 
 class TestUploadPolicy(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_getUtility_returns_class(self):
diff --git a/lib/lp/archiveuploader/uploadpolicy.py b/lib/lp/archiveuploader/uploadpolicy.py
index 1448e31..2a99076 100644
--- a/lib/lp/archiveuploader/uploadpolicy.py
+++ b/lib/lp/archiveuploader/uploadpolicy.py
@@ -46,7 +46,6 @@ class IArchiveUploadPolicy(Interface):
 
 
 class ArchiveUploadType(EnumeratedType):
-
     SOURCE_ONLY = Item("Source only")
     BINARY_ONLY = Item("Binary only")
     MIXED_ONLY = Item("Mixed only")
diff --git a/lib/lp/archiveuploader/utils.py b/lib/lp/archiveuploader/utils.py
index 5b3e176..c355ba4 100644
--- a/lib/lp/archiveuploader/utils.py
+++ b/lib/lp/archiveuploader/utils.py
@@ -52,7 +52,6 @@ class UploadWarning(Warning):
 
 
 class DpkgSourceError(Exception):
-
     _fmt = "Unable to unpack source package (%(result)s): %(output)s"
 
     def __init__(self, command, output, result):
@@ -310,7 +309,7 @@ def merge_file_lists(files, checksums_sha1, checksums_sha256, changes=True):
     # that we see.
     file_hashes = defaultdict(dict)
     hash_files = defaultdict(lambda: defaultdict(int))
-    for (algo, checksums) in [
+    for algo, checksums in [
         ("SHA1", checksums_sha1),
         ("SHA256", checksums_sha256),
     ]:
diff --git a/lib/lp/blueprints/browser/person.py b/lib/lp/blueprints/browser/person.py
index 4efa613..f3b322c 100644
--- a/lib/lp/blueprints/browser/person.py
+++ b/lib/lp/blueprints/browser/person.py
@@ -15,7 +15,6 @@ from lp.services.webapp.publisher import LaunchpadView
 
 
 class PersonSpecsMenu(NavigationMenu):
-
     usedfor = IPerson
     facet = "specifications"
     links = [
diff --git a/lib/lp/blueprints/browser/specification.py b/lib/lp/blueprints/browser/specification.py
index 92f61af..262b7d6 100644
--- a/lib/lp/blueprints/browser/specification.py
+++ b/lib/lp/blueprints/browser/specification.py
@@ -475,7 +475,6 @@ class NewSpecificationFromSprintView(NewSpecificationFromNonTargetView):
 
 
 class SpecificationNavigation(Navigation):
-
     usedfor = ISpecification
 
     @stepthrough("+subscription")
@@ -513,14 +512,12 @@ class SpecificationEditLinksMixin:
 
 
 class SpecificationActionMenu(NavigationMenu, SpecificationEditLinksMixin):
-
     usedfor = ISpecification
     facet = "specifications"
     links = ("edit", "supersede", "retarget")
 
 
 class SpecificationContextMenu(ContextMenu, SpecificationEditLinksMixin):
-
     usedfor = ISpecification
     links = [
         "edit",
@@ -864,7 +861,6 @@ class SpecificationEditSchema(ISpecification):
 
 
 class SpecificationEditView(LaunchpadEditFormView):
-
     schema = SpecificationEditSchema
     field_names = ["name", "title", "specurl", "summary", "whiteboard"]
     next_url = None
@@ -1071,12 +1067,10 @@ class SpecificationGoalDecideView(LaunchpadFormView):
 
 
 class ISpecificationRetargetingSchema(Interface):
-
     target = copy_field(ISpecification["target"], readonly=False)
 
 
 class SpecificationRetargetingView(LaunchpadFormView):
-
     schema = ISpecificationRetargetingSchema
     field_names = ["target"]
     label = _("Move this blueprint to a different project")
@@ -1385,7 +1379,6 @@ class SpecGraph:
 
 
 class SpecificationSprintAddView(LaunchpadFormView):
-
     schema = ISprintSpecification
     label = _("Propose specification for meeting agenda")
     field_names = ["sprint"]
@@ -1564,7 +1557,6 @@ here = os.path.dirname(__file__)
 
 
 class SpecificationTreePNGView(SpecificationTreeGraphView):
-
     fail_over_image_path = os.path.join(
         config.root,
         "lib",
diff --git a/lib/lp/blueprints/browser/specificationdependency.py b/lib/lp/blueprints/browser/specificationdependency.py
index 513ac61..5955658 100644
--- a/lib/lp/blueprints/browser/specificationdependency.py
+++ b/lib/lp/blueprints/browser/specificationdependency.py
@@ -23,7 +23,6 @@ from lp.services.webapp import LaunchpadView, canonical_url
 
 
 class AddSpecificationDependencySchema(Interface):
-
     dependency = copy_field(
         ISpecificationDependency["dependency"],
         readonly=False,
@@ -89,7 +88,6 @@ class SpecificationDependencyRemoveView(LaunchpadFormView):
 
 
 class SpecificationDependencyTreeView(LaunchpadView):
-
     label = "Blueprint dependency tree"
 
     @property
diff --git a/lib/lp/blueprints/browser/specificationsubscription.py b/lib/lp/blueprints/browser/specificationsubscription.py
index c4e15ae..c8f9432 100644
--- a/lib/lp/blueprints/browser/specificationsubscription.py
+++ b/lib/lp/blueprints/browser/specificationsubscription.py
@@ -113,7 +113,6 @@ class SpecificationSubscriptionDeleteView(LaunchpadFormView):
 
 
 class SpecificationSubscriptionEditView(LaunchpadEditFormView):
-
     schema = ISpecificationSubscription
     field_names = ["essential"]
 
diff --git a/lib/lp/blueprints/browser/sprint.py b/lib/lp/blueprints/browser/sprint.py
index debe896..d7eb8d0 100644
--- a/lib/lp/blueprints/browser/sprint.py
+++ b/lib/lp/blueprints/browser/sprint.py
@@ -91,7 +91,6 @@ class SprintFacets(StandardLaunchpadFacets):
 
 
 class SprintNavigation(Navigation):
-
     usedfor = ISprint
 
 
@@ -159,7 +158,6 @@ class SprintSpecificationsMenu(NavigationMenu, HasSpecificationsMenuMixin):
 
 
 class SprintSetNavigation(GetitemNavigation):
-
     usedfor = ISprintSet
 
 
@@ -170,13 +168,11 @@ class SprintSetBreadcrumb(Breadcrumb):
 
 
 class HasSprintsView(LaunchpadView):
-
     page_title = "Events"
 
 
 @implementer(IMajorHeadingView)
 class SprintView(HasSpecificationsView):
-
     # XXX Michael Nelson 20090923 bug=435255
     # This class inherits a label from HasSpecificationsView, which causes
     # a second h1 to display. But as this view implements IMajorHeadingView
@@ -335,7 +331,6 @@ class SprintAddView(LaunchpadFormView):
 
 
 class SprintBrandingView(BrandingChangeView):
-
     schema = ISprint
     # sabdfl 2007-03-28 deliberately leaving icon off the list, i think it
     # would be overkill, we can add it later if people ask for it
@@ -543,7 +538,6 @@ class SprintMeetingExportView(LaunchpadView):
         for spec in self.context.specifications(
             self.user, filter=[SpecificationFilter.ACCEPTED]
         ):
-
             # Skip sprints with no priority or less than LOW.
             if spec.priority < SpecificationPriority.UNDEFINED:
                 continue
diff --git a/lib/lp/blueprints/browser/sprintattendance.py b/lib/lp/blueprints/browser/sprintattendance.py
index baeea2f..acb8d48 100644
--- a/lib/lp/blueprints/browser/sprintattendance.py
+++ b/lib/lp/blueprints/browser/sprintattendance.py
@@ -22,7 +22,6 @@ from lp.services.webapp import canonical_url
 
 
 class BaseSprintAttendanceAddView(LaunchpadFormView):
-
     schema = ISprintAttendance
     custom_widget_time_starts = DateTimeWidget
     custom_widget_time_ends = DateTimeWidget
diff --git a/lib/lp/blueprints/browser/tests/test_hasspecifications.py b/lib/lp/blueprints/browser/tests/test_hasspecifications.py
index 501fc63..289ee9f 100644
--- a/lib/lp/blueprints/browser/tests/test_hasspecifications.py
+++ b/lib/lp/blueprints/browser/tests/test_hasspecifications.py
@@ -7,7 +7,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestPersonSpecWorkloadView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/blueprints/browser/tests/test_person_upcomingwork.py b/lib/lp/blueprints/browser/tests/test_person_upcomingwork.py
index 917012d..3dc34df 100644
--- a/lib/lp/blueprints/browser/tests/test_person_upcomingwork.py
+++ b/lib/lp/blueprints/browser/tests/test_person_upcomingwork.py
@@ -25,7 +25,6 @@ from lp.testing.views import create_initialized_view
 
 
 class Test_getWorkItemsDueBefore(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -190,7 +189,6 @@ class Test_getWorkItemsDueBefore(TestCaseWithFactory):
 
 
 class TestGenericWorkItem(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -254,7 +252,6 @@ class TestWorkItemContainer(TestCase):
 
 
 class TestPersonUpcomingWork(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -474,7 +471,6 @@ class TestPersonUpcomingWork(BrowserTestCase):
 
 
 class TestPersonUpcomingWorkView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/blueprints/browser/tests/test_specification.py b/lib/lp/blueprints/browser/tests/test_specification.py
index 4dd927b..3833820 100644
--- a/lib/lp/blueprints/browser/tests/test_specification.py
+++ b/lib/lp/blueprints/browser/tests/test_specification.py
@@ -55,7 +55,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestSpecificationSearch(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_search_with_percent(self):
@@ -67,7 +66,6 @@ class TestSpecificationSearch(TestCaseWithFactory):
 
 
 class TestBranchTraversal(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -227,7 +225,6 @@ class TestSpecificationView(BrowserTestCase):
 
 
 class TestSpecificationSet(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_index_with_proprietary(self):
@@ -264,7 +261,6 @@ class TestSpecificationSet(BrowserTestCase):
 
 
 class TestSpecificationInformationType(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     portlet_tag = soupmatchers.Tag(
@@ -398,7 +394,6 @@ NEW_SPEC_FROM_ROOT_URL = "http://blueprints.launchpad.test/specs/+new"
 
 
 class NewSpecificationTests:
-
     expected_keys = {"PROPRIETARY", "PUBLIC", "EMBARGOED"}
 
     def _create_form_data(self, context):
@@ -445,7 +440,6 @@ class NewSpecificationTests:
 class TestNewSpecificationFromRootView(
     TestCaseWithFactory, NewSpecificationTests
 ):
-
     layer = DatabaseFunctionalLayer
 
     def createInitializedView(self):
@@ -466,7 +460,6 @@ class TestNewSpecificationFromRootView(
 class TestNewSpecificationFromSprintView(
     TestCaseWithFactory, NewSpecificationTests
 ):
-
     layer = DatabaseFunctionalLayer
 
     def createInitializedView(self):
@@ -487,7 +480,6 @@ class TestNewSpecificationFromSprintView(
 class TestNewSpecificationFromProjectGroupView(
     TestCaseWithFactory, NewSpecificationTests
 ):
-
     layer = DatabaseFunctionalLayer
 
     def createInitializedView(self):
@@ -508,7 +500,6 @@ class TestNewSpecificationFromProjectGroupView(
 class TestNewSpecificationFromProductView(
     TestCaseWithFactory, NewSpecificationTests
 ):
-
     layer = DatabaseFunctionalLayer
 
     expected_keys = {"PROPRIETARY", "EMBARGOED"}
@@ -530,7 +521,6 @@ class TestNewSpecificationFromProductView(
 class TestNewSpecificationFromDistributionView(
     TestCaseWithFactory, NewSpecificationTests
 ):
-
     layer = DatabaseFunctionalLayer
 
     expected_keys = {"PUBLIC"}
@@ -541,7 +531,6 @@ class TestNewSpecificationFromDistributionView(
 
 
 class TestNewSpecificationInformationType(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -628,7 +617,6 @@ class TestNewSpecificationInformationType(BrowserTestCase):
 
 
 class BaseNewSpecificationInformationTypeDefaultMixin:
-
     layer = DatabaseFunctionalLayer
 
     def _setUp(self):
@@ -917,7 +905,6 @@ class TestSecificationHelpers(unittest.TestCase):
 
 
 class TestSpecificationFieldXHTMLRepresentations(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_starter_empty(self):
diff --git a/lib/lp/blueprints/browser/tests/test_specificationdependency.py b/lib/lp/blueprints/browser/tests/test_specificationdependency.py
index b42cfa7..0b49e3f 100644
--- a/lib/lp/blueprints/browser/tests/test_specificationdependency.py
+++ b/lib/lp/blueprints/browser/tests/test_specificationdependency.py
@@ -20,7 +20,6 @@ from lp.testing.views import create_view
 
 
 class TestAddDependency(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_add_dependency_by_url(self):
@@ -42,7 +41,6 @@ class TestAddDependency(BrowserTestCase):
 
 
 class TestDepTree(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_deptree_filters_dependencies(self):
diff --git a/lib/lp/blueprints/browser/tests/test_specificationtarget.py b/lib/lp/blueprints/browser/tests/test_specificationtarget.py
index 8d51ef1..931c046 100644
--- a/lib/lp/blueprints/browser/tests/test_specificationtarget.py
+++ b/lib/lp/blueprints/browser/tests/test_specificationtarget.py
@@ -123,7 +123,6 @@ class TestHasSpecificationsViewInvolvement(TestCaseWithFactory):
 
 
 class TestAssignments(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -217,7 +216,6 @@ class TestHasSpecificationsTemplates(TestCaseWithFactory):
 
 
 class TestHasSpecificationsConfiguration(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_cannot_configure_blueprints_product_no_edit_permission(self):
@@ -320,7 +318,6 @@ class SpecificationSetViewTestCase(TestCaseWithFactory):
 
 
 class TestPrivacy(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_product_specs(self):
diff --git a/lib/lp/blueprints/browser/tests/test_sprint.py b/lib/lp/blueprints/browser/tests/test_sprint.py
index 00d63f3..dadc252 100644
--- a/lib/lp/blueprints/browser/tests/test_sprint.py
+++ b/lib/lp/blueprints/browser/tests/test_sprint.py
@@ -22,7 +22,6 @@ from lp.testing.matchers import BrowsesWithQueryLimit, HasQueryCount
 
 
 class TestSprintIndex(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_query_count(self):
@@ -64,7 +63,6 @@ class TestSprintIndex(BrowserTestCase):
 
 
 class TestSprintDeleteView(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def makePopulatedSprint(self):
diff --git a/lib/lp/blueprints/browser/tests/test_views.py b/lib/lp/blueprints/browser/tests/test_views.py
index 1e2c49e..5acb18d 100644
--- a/lib/lp/blueprints/browser/tests/test_views.py
+++ b/lib/lp/blueprints/browser/tests/test_views.py
@@ -25,7 +25,6 @@ from lp.testing.systemdocs import LayeredDocFileSuite, setUp, tearDown
 
 
 class TestAssignments(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/blueprints/interfaces/specification.py b/lib/lp/blueprints/interfaces/specification.py
index b47f64d..6615407 100644
--- a/lib/lp/blueprints/interfaces/specification.py
+++ b/lib/lp/blueprints/interfaces/specification.py
@@ -83,7 +83,6 @@ class GoalProposeError(Exception):
 
 
 class SpecNameField(ContentNameField):
-
     errormessage = _("%s is already in use by another blueprint.")
 
     @property
@@ -126,7 +125,6 @@ class SpecNameField(ContentNameField):
 
 
 class SpecURLField(TextLine):
-
     errormessage = _('%s is already registered by <a href="%s">%s</a>.')
 
     def _validate(self, specurl):
diff --git a/lib/lp/blueprints/interfaces/sprint.py b/lib/lp/blueprints/interfaces/sprint.py
index 9809925..e9a52d4 100644
--- a/lib/lp/blueprints/interfaces/sprint.py
+++ b/lib/lp/blueprints/interfaces/sprint.py
@@ -32,7 +32,6 @@ from lp.services.fields import (
 
 
 class SprintNameField(ContentNameField):
-
     errormessage = _("%s is already in use by another sprint.")
 
     @property
diff --git a/lib/lp/blueprints/model/specificationworkitem.py b/lib/lp/blueprints/model/specificationworkitem.py
index a7e5ec1..79f9316 100644
--- a/lib/lp/blueprints/model/specificationworkitem.py
+++ b/lib/lp/blueprints/model/specificationworkitem.py
@@ -24,7 +24,6 @@ from lp.services.helpers import backslashreplace
 
 @implementer(ISpecificationWorkItem)
 class SpecificationWorkItem(StormBase):
-
     __storm_table__ = "SpecificationWorkItem"
     __storm_order__ = "id"
 
diff --git a/lib/lp/blueprints/model/tests/test_specification.py b/lib/lp/blueprints/model/tests/test_specification.py
index 79f6b5c..f361df4 100644
--- a/lib/lp/blueprints/model/tests/test_specification.py
+++ b/lib/lp/blueprints/model/tests/test_specification.py
@@ -151,7 +151,6 @@ class TestSpecificationDependencies(TestCaseWithFactory):
 
 
 class TestSpecificationSubscriptionSort(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_subscribers(self):
@@ -174,7 +173,6 @@ class TestSpecificationSubscriptionSort(TestCaseWithFactory):
 
 
 class TestSpecificationValidation(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_specurl_validation_duplicate(self):
@@ -746,7 +744,6 @@ class TestSpecificationWorkItems(TestCaseWithFactory):
 
 
 class TestSpecificationInformationType(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_transitionToInformationType(self):
diff --git a/lib/lp/blueprints/model/tests/test_sprint.py b/lib/lp/blueprints/model/tests/test_sprint.py
index 7fdbcc9..5c5ba93 100644
--- a/lib/lp/blueprints/model/tests/test_sprint.py
+++ b/lib/lp/blueprints/model/tests/test_sprint.py
@@ -27,7 +27,6 @@ def list_result(sprint, filter=None, user=None):
 
 
 class TestSpecifications(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -246,7 +245,6 @@ class TestSpecifications(TestCaseWithFactory):
 
 
 class TestSprintAttendancesSort(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_attendances(self):
diff --git a/lib/lp/blueprints/publisher.py b/lib/lp/blueprints/publisher.py
index a138910..0f56d5b 100644
--- a/lib/lp/blueprints/publisher.py
+++ b/lib/lp/blueprints/publisher.py
@@ -24,7 +24,6 @@ from lp.services.webapp.servers import (
 
 @implementer(IFacet)
 class SpecificationsFacet:
-
     name = "specifications"
     rootsite = "blueprints"
     text = "Blueprints"
diff --git a/lib/lp/blueprints/security.py b/lib/lp/blueprints/security.py
index a310438..76217f4 100644
--- a/lib/lp/blueprints/security.py
+++ b/lib/lp/blueprints/security.py
@@ -26,7 +26,6 @@ from lp.security import ModerateByRegistryExpertsOrAdmins
 
 
 class EditSpecificationBranch(AuthorizationBase):
-
     usedfor = ISpecificationBranch
     permission = "launchpad.Edit"
 
@@ -39,7 +38,6 @@ class EditSpecificationBranch(AuthorizationBase):
 
 
 class ViewSpecificationBranch(EditSpecificationBranch):
-
     permission = "launchpad.View"
 
     def checkUnauthenticated(self):
@@ -62,7 +60,6 @@ class AnonymousAccessToISpecificationPublic(AnonymousAuthorization):
 
 
 class ViewSpecification(AuthorizationBase):
-
     permission = "launchpad.LimitedView"
     usedfor = ISpecificationView
 
diff --git a/lib/lp/blueprints/tests/test_hasspecifications.py b/lib/lp/blueprints/tests/test_hasspecifications.py
index 7082cd5..bd735d6 100644
--- a/lib/lp/blueprints/tests/test_hasspecifications.py
+++ b/lib/lp/blueprints/tests/test_hasspecifications.py
@@ -11,7 +11,6 @@ from lp.testing.matchers import DoesNotSnapshot
 
 
 class HasSpecificationsTests(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def assertNamesOfSpecificationsAre(self, expected_names, specifications):
diff --git a/lib/lp/blueprints/tests/test_specification.py b/lib/lp/blueprints/tests/test_specification.py
index 2778005..728bcf5 100644
--- a/lib/lp/blueprints/tests/test_specification.py
+++ b/lib/lp/blueprints/tests/test_specification.py
@@ -52,7 +52,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class SpecificationTests(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_target_driver_has_edit_rights(self):
@@ -721,7 +720,6 @@ class SpecificationTests(TestCaseWithFactory):
 
 
 class TestSpecificationSet(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -776,7 +774,6 @@ def list_result(context, filter=None, user=None):
 
 
 class TestSpecifications(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -1055,7 +1052,6 @@ class TestSpecifications(TestCaseWithFactory):
 
 
 class TestBugLinks(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_link_and_unlink(self):
diff --git a/lib/lp/blueprints/tests/test_webservice.py b/lib/lp/blueprints/tests/test_webservice.py
index f0f1ae1..c7ffd6f 100644
--- a/lib/lp/blueprints/tests/test_webservice.py
+++ b/lib/lp/blueprints/tests/test_webservice.py
@@ -350,7 +350,6 @@ class SpecificationAttributeWebserviceTests(TestCaseWithFactory):
 
 
 class SpecificationMutationTests(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_set_information_type(self):
@@ -569,7 +568,6 @@ class IHasSpecificationsTests(TestCaseWithFactory):
 
 
 class TestSpecificationSubscription(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_subscribe(self):
@@ -636,7 +634,6 @@ class TestSpecificationSubscription(TestCaseWithFactory):
 
 
 class TestSpecificationBugLinks(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_bug_linking(self):
@@ -713,7 +710,6 @@ class TestSpecificationBugLinks(TestCaseWithFactory):
 
 
 class TestSpecificationGoalHandling(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/adapters/tests/test_bugchange.py b/lib/lp/bugs/adapters/tests/test_bugchange.py
index 6a8c3b9..0e8515a 100644
--- a/lib/lp/bugs/adapters/tests/test_bugchange.py
+++ b/lib/lp/bugs/adapters/tests/test_bugchange.py
@@ -19,7 +19,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class BugChangeTestCase(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -42,7 +41,6 @@ class BugChangeTestCase(TestCaseWithFactory):
 
 
 class BugChangeLevelTestCase(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/adapters/tests/test_bugsubscriptionfilter.py b/lib/lp/bugs/adapters/tests/test_bugsubscriptionfilter.py
index b17527f..80aaf13 100644
--- a/lib/lp/bugs/adapters/tests/test_bugsubscriptionfilter.py
+++ b/lib/lp/bugs/adapters/tests/test_bugsubscriptionfilter.py
@@ -14,7 +14,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class BugSubscriptionFilterTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_bugsubscriptionfilter_to_product_with_product(self):
diff --git a/lib/lp/bugs/browser/bug.py b/lib/lp/bugs/browser/bug.py
index 717f39c..3a34c23 100644
--- a/lib/lp/bugs/browser/bug.py
+++ b/lib/lp/bugs/browser/bug.py
@@ -631,7 +631,6 @@ class BugView(LaunchpadView, BugViewMixin):
 
 
 class BugActivity(BugView):
-
     page_title = "Activity log"
 
     @cachedproperty
@@ -1186,7 +1185,6 @@ class BugTextView(LaunchpadView):
         ]
 
     def bug_text(self):
-
         """Return the bug information for text display."""
         bug = self.context
 
diff --git a/lib/lp/bugs/browser/bugalsoaffects.py b/lib/lp/bugs/browser/bugalsoaffects.py
index 642dd90..3558dc4 100644
--- a/lib/lp/bugs/browser/bugalsoaffects.py
+++ b/lib/lp/bugs/browser/bugalsoaffects.py
@@ -344,7 +344,6 @@ class BugTaskCreationStep(AlsoAffectsStep):
 
 
 class IAddDistroBugTaskForm(IAddBugTaskForm):
-
     sourcepackagename = Choice(
         title=_("Source Package Name"),
         required=False,
@@ -777,7 +776,6 @@ class BugTrackerCreationStep(AlsoAffectsStep):
 
 
 class DistroBugTrackerCreationStep(BugTrackerCreationStep):
-
     _next_step = DistroBugTaskCreationStep
     _field_names = ["distribution", "sourcepackagename", "bug_url"]
     custom_widget_distribution = CustomWidgetFactory(
@@ -793,7 +791,6 @@ class DistroBugTrackerCreationStep(BugTrackerCreationStep):
 
 
 class UpstreamBugTrackerCreationStep(BugTrackerCreationStep):
-
     schema = IAddBugTaskWithUpstreamLinkForm
     _next_step = ProductBugTaskCreationStep
     _field_names = ["product", "bug_url", "link_upstream_how"]
diff --git a/lib/lp/bugs/browser/bugattachment.py b/lib/lp/bugs/browser/bugattachment.py
index 0588b51..65d782b 100644
--- a/lib/lp/bugs/browser/bugattachment.py
+++ b/lib/lp/bugs/browser/bugattachment.py
@@ -70,7 +70,6 @@ class BugAttachmentContentCheck:
 
 
 class BugAttachmentSetNavigation(GetitemNavigation):
-
     usedfor = IBugAttachmentSet
 
 
diff --git a/lib/lp/bugs/browser/bugmessage.py b/lib/lp/bugs/browser/bugmessage.py
index 45761fc..4f61fb6 100644
--- a/lib/lp/bugs/browser/bugmessage.py
+++ b/lib/lp/bugs/browser/bugmessage.py
@@ -53,7 +53,6 @@ class BugMessageAddFormView(LaunchpadFormView, BugAttachmentContentCheck):
         return "%s/+addcomment" % canonical_url(self.context)
 
     def validate(self, data):
-
         # Ensure either a comment or filecontent or a URL was provided,
         # but only if no errors have already been noted.
         if len(self.errors) == 0:
@@ -113,7 +112,6 @@ class BugMessageAddFormView(LaunchpadFormView, BugAttachmentContentCheck):
         attachment_description = data.get("attachment_description")
 
         if file_:
-
             # Slashes in filenames cause problems, convert them to dashes
             # instead.
             filename = file_.filename.replace("/", "-")
diff --git a/lib/lp/bugs/browser/bugnomination.py b/lib/lp/bugs/browser/bugnomination.py
index cf6c816..22d8941 100644
--- a/lib/lp/bugs/browser/bugnomination.py
+++ b/lib/lp/bugs/browser/bugnomination.py
@@ -28,7 +28,6 @@ from lp.services.webapp.interfaces import ILaunchBag
 
 
 class BugNominationView(LaunchpadFormView):
-
     schema = IBugNominationForm
     initial_focus_widget = None
     custom_widget_nominatable_series = LabeledMultiCheckBoxWidget
diff --git a/lib/lp/bugs/browser/bugtarget.py b/lib/lp/bugs/browser/bugtarget.py
index c706156..6e4b6f8 100644
--- a/lib/lp/bugs/browser/bugtarget.py
+++ b/lib/lp/bugs/browser/bugtarget.py
@@ -986,7 +986,6 @@ class FileBugAdvancedView(LaunchpadView):
 
 
 class IDistroBugAddForm(IBugAddForm):
-
     packagename = copy_field(
         IBugAddForm["packagename"], vocabularyName="DistributionSourcePackage"
     )
@@ -1076,7 +1075,6 @@ class FilebugShowSimilarBugsView(FileBugViewBase):
 
 
 class FileBugGuidedView(FilebugShowSimilarBugsView):
-
     page_title = "Report a bug"
 
     _SEARCH_FOR_DUPES = ViewPageTemplateFile(
diff --git a/lib/lp/bugs/browser/bugtask.py b/lib/lp/bugs/browser/bugtask.py
index f30dea5..ad3a7a2 100644
--- a/lib/lp/bugs/browser/bugtask.py
+++ b/lib/lp/bugs/browser/bugtask.py
@@ -1158,7 +1158,6 @@ class BugTaskPrivilegeMixin:
 
 
 class IBugTaskEditForm(IBugTask):
-
     sourcepackagename = copy_field(
         IBugTask["sourcepackagename"],
         vocabularyName="DistributionSourcePackage",
diff --git a/lib/lp/bugs/browser/bugtracker.py b/lib/lp/bugs/browser/bugtracker.py
index 0c02abc..07389e1 100644
--- a/lib/lp/bugs/browser/bugtracker.py
+++ b/lib/lp/bugs/browser/bugtracker.py
@@ -84,12 +84,10 @@ NO_DIRECT_CREATION_TRACKERS = SINGLE_INSTANCE_TRACKERS + (
 
 
 class BugTrackerSetNavigation(GetitemNavigation):
-
     usedfor = IBugTrackerSet
 
 
 class BugTrackerSetContextMenu(ContextMenu):
-
     usedfor = IBugTrackerSet
 
     links = ["newbugtracker"]
@@ -100,7 +98,6 @@ class BugTrackerSetContextMenu(ContextMenu):
 
 
 class BugTrackerAddView(LaunchpadFormView):
-
     page_title = "Register an external bug tracker"
     schema = IBugTracker
     label = page_title
@@ -216,7 +213,6 @@ class BugTrackerSetView(LaunchpadView):
 
 
 class BugTrackerView(LaunchpadView):
-
     usedfor = IBugTracker
 
     @property
@@ -250,7 +246,6 @@ BUG_TRACKER_ACTIVE_VOCABULARY = SimpleVocabulary.fromItems(
 
 
 class BugTrackerEditView(LaunchpadEditFormView):
-
     schema = IBugTracker
     custom_widget_summary = CustomWidgetFactory(
         TextAreaWidget, width=30, height=5
@@ -469,7 +464,6 @@ class BugTrackerEditView(LaunchpadEditFormView):
 
 
 class BugTrackerNavigation(Navigation):
-
     usedfor = IBugTracker
 
     def traverse(self, remotebug):
@@ -578,7 +572,6 @@ class BugTrackerEditComponentView(LaunchpadEditFormView):
 
 
 class BugTrackerComponentGroupNavigation(Navigation):
-
     usedfor = IBugTrackerComponentGroup
 
     def traverse(self, id):
@@ -618,7 +611,6 @@ class RemoteBugView(LaunchpadView):
 
 
 class BugTrackerNavigationMenu(NavigationMenu):
-
     usedfor = BugTrackerView
     facet = "bugs"
     links = ["edit"]
diff --git a/lib/lp/bugs/browser/bugwatch.py b/lib/lp/bugs/browser/bugwatch.py
index 70ba5eb..d1d51bd 100644
--- a/lib/lp/bugs/browser/bugwatch.py
+++ b/lib/lp/bugs/browser/bugwatch.py
@@ -33,7 +33,6 @@ from lp.services.webapp.interfaces import ILaunchBag
 
 
 class BugWatchSetNavigation(GetitemNavigation):
-
     usedfor = IBugWatchSet
 
 
diff --git a/lib/lp/bugs/browser/cve.py b/lib/lp/bugs/browser/cve.py
index 1067612..5f42ed7 100644
--- a/lib/lp/bugs/browser/cve.py
+++ b/lib/lp/bugs/browser/cve.py
@@ -30,12 +30,10 @@ from lp.services.webapp.batching import BatchNavigator
 
 
 class CveSetNavigation(GetitemNavigation):
-
     usedfor = ICveSet
 
 
 class CveContextMenu(ContextMenu):
-
     usedfor = ICve
     links = ["linkbug", "unlinkbug"]
 
@@ -50,7 +48,6 @@ class CveContextMenu(ContextMenu):
 
 
 class CveSetContextMenu(ContextMenu):
-
     usedfor = ICveSet
     links = ["findcve", "allcve"]
 
diff --git a/lib/lp/bugs/browser/cvereport.py b/lib/lp/bugs/browser/cvereport.py
index e2f2f7d..2c5ae2d 100644
--- a/lib/lp/bugs/browser/cvereport.py
+++ b/lib/lp/bugs/browser/cvereport.py
@@ -84,7 +84,6 @@ class CVEReportView(LaunchpadView):
 
     @cachedproperty
     def _bugtaskcves(self) -> BugTaskCves:
-
         bugtaskcves = BugTaskCves(open=[], resolved=[])
 
         search_params = BugTaskSearchParams(self.user, has_cve=True)
diff --git a/lib/lp/bugs/browser/malone.py b/lib/lp/bugs/browser/malone.py
index ff178e8..6b72df5 100644
--- a/lib/lp/bugs/browser/malone.py
+++ b/lib/lp/bugs/browser/malone.py
@@ -25,7 +25,6 @@ from lp.services.webapp.menu import NavigationMenu
 
 
 class MaloneApplicationNavigation(Navigation):
-
     usedfor = IMaloneApplication
 
     newlayer = BugsLayer
@@ -66,7 +65,6 @@ class MaloneApplicationNavigation(Navigation):
 
 
 class MaloneRelatedPages(NavigationMenu):
-
     facet = "bugs"
     title = "Related pages"
     usedfor = MaloneView
diff --git a/lib/lp/bugs/browser/person.py b/lib/lp/bugs/browser/person.py
index 3182f60..cb004b8 100644
--- a/lib/lp/bugs/browser/person.py
+++ b/lib/lp/bugs/browser/person.py
@@ -63,7 +63,6 @@ def get_package_search_url(dsp_bugs_url, extra_params=None):
 
 
 class PersonBugsMenu(NavigationMenu):
-
     usedfor = IPerson
     facet = "bugs"
     links = [
@@ -159,7 +158,6 @@ class RelevantMilestonesMixin:
 
 
 class BugSubscriberPackageBugsOverView(LaunchpadView):
-
     label = "Subscribed packages"
 
     @cachedproperty
diff --git a/lib/lp/bugs/browser/structuralsubscription.py b/lib/lp/bugs/browser/structuralsubscription.py
index ddfa4d5..95e5145 100644
--- a/lib/lp/bugs/browser/structuralsubscription.py
+++ b/lib/lp/bugs/browser/structuralsubscription.py
@@ -54,7 +54,6 @@ from lp.services.webapp.publisher import (
 
 
 class StructuralSubscriptionNavigation(Navigation):
-
     usedfor = IStructuralSubscription
 
     @stepthrough("+filter")
diff --git a/lib/lp/bugs/browser/tests/test_bug_context_menu.py b/lib/lp/bugs/browser/tests/test_bug_context_menu.py
index 2b2472d..d3a1dea 100644
--- a/lib/lp/bugs/browser/tests/test_bug_context_menu.py
+++ b/lib/lp/bugs/browser/tests/test_bug_context_menu.py
@@ -16,7 +16,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestBugContextMenu(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bug_views.py b/lib/lp/bugs/browser/tests/test_bug_views.py
index 213887a..b4373ae 100644
--- a/lib/lp/bugs/browser/tests/test_bug_views.py
+++ b/lib/lp/bugs/browser/tests/test_bug_views.py
@@ -43,7 +43,6 @@ from lp.testing.views import create_initialized_view, create_view
 
 
 class TestPrivateBugLinks(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_private_master_not_linked_without_permission(self):
@@ -227,7 +226,6 @@ class TestEmailObfuscated(BrowserTestCase):
 
 
 class TestBugPortletSubscribers(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -956,7 +954,6 @@ class TestBugMarkAsDuplicateView(TestCaseWithFactory):
 
 
 class TestBugActivityView(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_bug_activity_query_count(self):
@@ -986,7 +983,6 @@ class TestBugActivityView(TestCaseWithFactory):
 
 
 class TestMainBugView(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugalsoaffects.py b/lib/lp/bugs/browser/tests/test_bugalsoaffects.py
index d8c3f3a..0e49526 100644
--- a/lib/lp/bugs/browser/tests/test_bugalsoaffects.py
+++ b/lib/lp/bugs/browser/tests/test_bugalsoaffects.py
@@ -12,7 +12,6 @@ from lp.testing.pages import get_feedback_messages
 
 
 class TestBugAlsoAffectsDistribution(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugcomment.py b/lib/lp/bugs/browser/tests/test_bugcomment.py
index 24d664c..35b7436 100644
--- a/lib/lp/bugs/browser/tests/test_bugcomment.py
+++ b/lib/lp/bugs/browser/tests/test_bugcomment.py
@@ -64,7 +64,6 @@ class BugCommentStub:
 
 
 class PersonStub:
-
     ids = count(1)
 
     def __init__(self):
@@ -218,7 +217,6 @@ class TestGroupCommentsWithActivities(TestCase):
 
 
 class TestBugCommentVisibility(BrowserTestCase, TestMessageVisibilityMixin):
-
     layer = DatabaseFunctionalLayer
 
     def makeHiddenMessage(self, comment_owner=None):
@@ -240,7 +238,6 @@ class TestBugCommentVisibility(BrowserTestCase, TestMessageVisibilityMixin):
 
 
 class TestBugHideCommentControls(BrowserTestCase, TestHideMessageControlMixin):
-
     layer = DatabaseFunctionalLayer
 
     def getContext(self, comment_owner=None):
@@ -283,7 +280,6 @@ class TestBugHideCommentControls(BrowserTestCase, TestHideMessageControlMixin):
 
 
 class TestBugCommentMicroformats(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_bug_comment_metadata(self):
@@ -307,7 +303,6 @@ class TestBugCommentMicroformats(BrowserTestCase):
 
 
 class TestBugCommentImplementsInterface(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_bug_comment_implements_interface(self):
@@ -346,7 +341,6 @@ def make_bug_comment(factory, *args, **kwargs):
 
 
 class TestBugCommentInBrowser(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_excessive_comments_redirect_to_download(self):
diff --git a/lib/lp/bugs/browser/tests/test_buglisting.py b/lib/lp/bugs/browser/tests/test_buglisting.py
index 271dcf1..f11f586 100644
--- a/lib/lp/bugs/browser/tests/test_buglisting.py
+++ b/lib/lp/bugs/browser/tests/test_buglisting.py
@@ -27,7 +27,6 @@ from lp.testing.views import create_initialized_view, create_view
 
 
 class TestBugTaskSearchListingPage(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def _makeDistributionSourcePackage(self):
@@ -314,7 +313,6 @@ class BugTargetTestCase(TestCaseWithFactory):
 
 
 class TestBugTaskSearchListingViewProduct(BugTargetTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_external_bugtracker_is_none(self):
@@ -409,7 +407,6 @@ class TestBugTaskSearchListingViewProduct(BugTargetTestCase):
 
 
 class TestBugTaskSearchListingViewDSP(BugTargetTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def _getBugTarget(self, obj):
diff --git a/lib/lp/bugs/browser/tests/test_bugnomination.py b/lib/lp/bugs/browser/tests/test_bugnomination.py
index 9732f71..b3b2eb6 100644
--- a/lib/lp/bugs/browser/tests/test_bugnomination.py
+++ b/lib/lp/bugs/browser/tests/test_bugnomination.py
@@ -174,7 +174,6 @@ class TestBugNominationView(TestCaseWithFactory):
 
 
 class TestBugEditLinks(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     edit_link_matcher = soupmatchers.HTMLContains(
diff --git a/lib/lp/bugs/browser/tests/test_bugsubscription_views.py b/lib/lp/bugs/browser/tests/test_bugsubscription_views.py
index 7f0fa3e..cb95564 100644
--- a/lib/lp/bugs/browser/tests/test_bugsubscription_views.py
+++ b/lib/lp/bugs/browser/tests/test_bugsubscription_views.py
@@ -37,7 +37,6 @@ from lp.testing.views import create_initialized_view
 
 
 class BugsubscriptionPrivacyTests(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -77,7 +76,6 @@ class BugsubscriptionPrivacyTests(TestCaseWithFactory):
 
 
 class BugSubscriptionAdvancedFeaturesTestCase(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugsubscriptionfilter.py b/lib/lp/bugs/browser/tests/test_bugsubscriptionfilter.py
index 090cae7..0a14d23 100644
--- a/lib/lp/bugs/browser/tests/test_bugsubscriptionfilter.py
+++ b/lib/lp/bugs/browser/tests/test_bugsubscriptionfilter.py
@@ -49,7 +49,6 @@ class TestBugSubscriptionFilterBase:
 class TestBugSubscriptionFilterNavigation(
     TestBugSubscriptionFilterBase, TestCaseWithFactory
 ):
-
     layer = DatabaseFunctionalLayer
 
     def test_canonical_url(self):
@@ -74,7 +73,6 @@ class TestBugSubscriptionFilterNavigation(
 class TestBugSubscriptionFilterAPI(
     TestBugSubscriptionFilterBase, TestCaseWithFactory
 ):
-
     layer = DatabaseFunctionalLayer
 
     def test_visible_attributes(self):
@@ -138,7 +136,6 @@ class TestBugSubscriptionFilterAPI(
 class TestBugSubscriptionFilterAPIModifications(
     TestBugSubscriptionFilterBase, TestCaseWithFactory
 ):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -246,7 +243,6 @@ class TestBugSubscriptionFilterAPIModifications(
 class TestBugSubscriptionFilterView(
     TestBugSubscriptionFilterBase, TestCaseWithFactory
 ):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -473,7 +469,6 @@ class TestBugSubscriptionFilterView(
 class TestBugSubscriptionFilterEditView(
     TestBugSubscriptionFilterBase, TestCaseWithFactory
 ):
-
     layer = DatabaseFunctionalLayer
 
     def test_view_properties(self):
@@ -587,7 +582,6 @@ class TestBugSubscriptionFilterAdvancedFeatures(TestCaseWithFactory):
 
 
 class TestBugSubscriptionFilterCreateView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugsupervisor.py b/lib/lp/bugs/browser/tests/test_bugsupervisor.py
index 0bc50cd..b6d5c57 100644
--- a/lib/lp/bugs/browser/tests/test_bugsupervisor.py
+++ b/lib/lp/bugs/browser/tests/test_bugsupervisor.py
@@ -16,7 +16,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestBugSupervisorEditView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -113,7 +112,6 @@ class TestBugSupervisorEditView(TestCaseWithFactory):
 
 
 class TestBugSupervisorLink(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def test_with_no_access(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugtarget_configure.py b/lib/lp/bugs/browser/tests/test_bugtarget_configure.py
index 880853f..77d3dad 100644
--- a/lib/lp/bugs/browser/tests/test_bugtarget_configure.py
+++ b/lib/lp/bugs/browser/tests/test_bugtarget_configure.py
@@ -11,7 +11,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestProductBugConfigurationView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugtarget_filebug.py b/lib/lp/bugs/browser/tests/test_bugtarget_filebug.py
index b101b86..0e1450d 100644
--- a/lib/lp/bugs/browser/tests/test_bugtarget_filebug.py
+++ b/lib/lp/bugs/browser/tests/test_bugtarget_filebug.py
@@ -41,7 +41,6 @@ from lp.testing.views import create_initialized_view, create_view
 
 
 class TestBugTargetFileBugConfirmationMessage(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -337,7 +336,6 @@ class FileBugViewMixin:
 
 
 class TestFileBugViewBase(FileBugViewMixin, TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_submit_comment_empty_error(self):
@@ -851,7 +849,6 @@ class FileBugViewBaseExtraDataTestCase(FileBugViewMixin, TestCaseWithFactory):
 
 
 class TestFileBugForNonBugSupervisors(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def filebug_via_view(
@@ -914,7 +911,6 @@ class TestFileBugForNonBugSupervisors(TestCaseWithFactory):
 
 
 class TestFileBugSourcePackage(WithScenarios, TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     scenarios = [
@@ -995,7 +991,6 @@ class TestFileBugSourcePackage(WithScenarios, TestCaseWithFactory):
 
 
 class ProjectGroupFileBugGuidedViewTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def makeProjectGroupFileBugView(self, product_name, bug_title, tags=""):
diff --git a/lib/lp/bugs/browser/tests/test_bugtarget_patches_view.py b/lib/lp/bugs/browser/tests/test_bugtarget_patches_view.py
index ade633f..ca935ab 100644
--- a/lib/lp/bugs/browser/tests/test_bugtarget_patches_view.py
+++ b/lib/lp/bugs/browser/tests/test_bugtarget_patches_view.py
@@ -12,7 +12,6 @@ from lp.testing.layers import LaunchpadFunctionalLayer
 
 
 class TestBugTargetPatchCountBase(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugtarget_tags.py b/lib/lp/bugs/browser/tests/test_bugtarget_tags.py
index eba3828..44a15ab 100644
--- a/lib/lp/bugs/browser/tests/test_bugtarget_tags.py
+++ b/lib/lp/bugs/browser/tests/test_bugtarget_tags.py
@@ -9,7 +9,6 @@ from lp.testing.views import create_view
 
 
 class TestBugTargetTags(WithScenarios, TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     scenarios = [
diff --git a/lib/lp/bugs/browser/tests/test_bugtask.py b/lib/lp/bugs/browser/tests/test_bugtask.py
index 3bfbb38..af11290 100644
--- a/lib/lp/bugs/browser/tests/test_bugtask.py
+++ b/lib/lp/bugs/browser/tests/test_bugtask.py
@@ -87,7 +87,6 @@ def getFeedViewCache(target, feed_cls):
 
 
 class TestBugTaskView(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_rendered_query_counts_constant_with_team_memberships(self):
@@ -366,7 +365,6 @@ class TestBugTaskView(TestCaseWithFactory):
 
 
 class TestBugTasksNominationsView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -627,7 +625,6 @@ class TestBugTasksNominationsView(TestCaseWithFactory):
 
 
 class TestBugTasksTableView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -1474,7 +1471,6 @@ class TestBugTaskEditViewStatusField(TestCaseWithFactory):
 
 
 class TestBugTaskEditViewAssigneeField(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -2098,7 +2094,6 @@ class TestProjectGroupBugs(TestCaseWithFactory, BugTaskViewTestMixin):
 
 
 class TestBugActivityItem(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setAttribute(self, obj, attribute, value):
@@ -2521,7 +2516,6 @@ def make_bug_task_listing_item(
 
 
 class TestBugTaskSearchListingView(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     client_listing = soupmatchers.Tag(
@@ -2995,7 +2989,6 @@ class TestBugTaskExpirableListingView(BrowserTestCase):
 
 
 class TestBugListingBatchNavigator(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_mustache_listings_escaped(self):
@@ -3006,7 +2999,6 @@ class TestBugListingBatchNavigator(TestCaseWithFactory):
 
 
 class TestBugTaskListingItem(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_model(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugtask_adding.py b/lib/lp/bugs/browser/tests/test_bugtask_adding.py
index 3e9f147..414d393 100644
--- a/lib/lp/bugs/browser/tests/test_bugtask_adding.py
+++ b/lib/lp/bugs/browser/tests/test_bugtask_adding.py
@@ -11,7 +11,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestProductBugTaskCreationStep(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugtask_navigation.py b/lib/lp/bugs/browser/tests/test_bugtask_navigation.py
index a3ce126..356f05d 100644
--- a/lib/lp/bugs/browser/tests/test_bugtask_navigation.py
+++ b/lib/lp/bugs/browser/tests/test_bugtask_navigation.py
@@ -13,7 +13,6 @@ from lp.testing.publication import test_traverse
 
 
 class TestBugTaskTraversal(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_traversal_to_nonexistent_bugtask(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugtracker_component.py b/lib/lp/bugs/browser/tests/test_bugtracker_component.py
index 8b6e9a2..c3d2bb9 100644
--- a/lib/lp/bugs/browser/tests/test_bugtracker_component.py
+++ b/lib/lp/bugs/browser/tests/test_bugtracker_component.py
@@ -13,7 +13,6 @@ from lp.testing.views import create_initialized_view
 
 
 class BugTrackerEditComponentViewTextCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugtracker_views.py b/lib/lp/bugs/browser/tests/test_bugtracker_views.py
index 521d6fa..642191b 100644
--- a/lib/lp/bugs/browser/tests/test_bugtracker_views.py
+++ b/lib/lp/bugs/browser/tests/test_bugtracker_views.py
@@ -15,7 +15,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestBugTrackerView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_related_projects(self):
@@ -53,7 +52,6 @@ class TestBugTrackerView(TestCaseWithFactory):
 
 
 class TestBugTrackerSetView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_trackers_are_batch_navigators(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugview.py b/lib/lp/bugs/browser/tests/test_bugview.py
index 1124544..695b2f2 100644
--- a/lib/lp/bugs/browser/tests/test_bugview.py
+++ b/lib/lp/bugs/browser/tests/test_bugview.py
@@ -12,7 +12,6 @@ from lp.testing.layers import DatabaseFunctionalLayer, LaunchpadFunctionalLayer
 
 
 class TestBugView(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -57,7 +56,6 @@ class TestBugView(TestCaseWithFactory):
 
 
 class TestBugInformationTypePortletView(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_bugwatch_views.py b/lib/lp/bugs/browser/tests/test_bugwatch_views.py
index 47c0cc0..9e2f4f2 100644
--- a/lib/lp/bugs/browser/tests/test_bugwatch_views.py
+++ b/lib/lp/bugs/browser/tests/test_bugwatch_views.py
@@ -17,7 +17,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestBugWatchEditView(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_configure_bugtracker_links.py b/lib/lp/bugs/browser/tests/test_configure_bugtracker_links.py
index ab62e59..0f41faa 100644
--- a/lib/lp/bugs/browser/tests/test_configure_bugtracker_links.py
+++ b/lib/lp/bugs/browser/tests/test_configure_bugtracker_links.py
@@ -14,7 +14,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestConfigureBugTrackerBase(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/tests/test_expose.py b/lib/lp/bugs/browser/tests/test_expose.py
index c52ca47..c846754 100644
--- a/lib/lp/bugs/browser/tests/test_expose.py
+++ b/lib/lp/bugs/browser/tests/test_expose.py
@@ -347,7 +347,6 @@ class TestStructuralSubscriptionHelpers(TestCase):
 
 
 class TestIntegrationExposeUserSubscriptionsToJS(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_team_admin_subscription(self):
diff --git a/lib/lp/bugs/browser/tests/test_person_bugs.py b/lib/lp/bugs/browser/tests/test_person_bugs.py
index cc5f9a5..455eac1 100644
--- a/lib/lp/bugs/browser/tests/test_person_bugs.py
+++ b/lib/lp/bugs/browser/tests/test_person_bugs.py
@@ -9,7 +9,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class PersonBugsMenuTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_user(self):
diff --git a/lib/lp/bugs/browser/tests/test_structuralsubscription.py b/lib/lp/bugs/browser/tests/test_structuralsubscription.py
index b8ee3cf..076de82 100644
--- a/lib/lp/bugs/browser/tests/test_structuralsubscription.py
+++ b/lib/lp/bugs/browser/tests/test_structuralsubscription.py
@@ -239,7 +239,6 @@ class TestSourcePackageStructuralSubscribersPortletView(
 
 
 class TestStructuralSubscriptionAPI(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/browser/widgets/tests/test_bug.py b/lib/lp/bugs/browser/widgets/tests/test_bug.py
index f61f245..cc7f2a4 100644
--- a/lib/lp/bugs/browser/widgets/tests/test_bug.py
+++ b/lib/lp/bugs/browser/widgets/tests/test_bug.py
@@ -9,7 +9,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class BugTagsWidgetTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def get_widget(self, bug_target):
diff --git a/lib/lp/bugs/externalbugtracker/tests/test_externalbugtracker.py b/lib/lp/bugs/externalbugtracker/tests/test_externalbugtracker.py
index 03b3197..de2a217 100644
--- a/lib/lp/bugs/externalbugtracker/tests/test_externalbugtracker.py
+++ b/lib/lp/bugs/externalbugtracker/tests/test_externalbugtracker.py
@@ -44,7 +44,6 @@ class CommentPushingExternalBugTracker(ExternalBugTracker):
 
 
 class TestCheckwatchesConfig(TestCase):
-
     layer = ZopelessDatabaseLayer
     base_url = "http://www.example.com/"
 
diff --git a/lib/lp/bugs/externalbugtracker/tests/test_github.py b/lib/lp/bugs/externalbugtracker/tests/test_github.py
index 7ecc43b..870b706 100644
--- a/lib/lp/bugs/externalbugtracker/tests/test_github.py
+++ b/lib/lp/bugs/externalbugtracker/tests/test_github.py
@@ -52,7 +52,6 @@ def _add_rate_limit_response(
 
 
 class TestGitHubRateLimit(TestCase):
-
     layer = ZopelessLayer
 
     def setUp(self):
@@ -130,7 +129,6 @@ class TestGitHubRateLimit(TestCase):
 
 
 class TestGitHub(TestCase):
-
     layer = ZopelessLayer
 
     def setUp(self):
@@ -401,7 +399,6 @@ class TestGitHub(TestCase):
 
 
 class TestGitHubUpdateBugWatches(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     @responses.activate
diff --git a/lib/lp/bugs/externalbugtracker/tests/test_gitlab.py b/lib/lp/bugs/externalbugtracker/tests/test_gitlab.py
index a95b998..cb53149 100644
--- a/lib/lp/bugs/externalbugtracker/tests/test_gitlab.py
+++ b/lib/lp/bugs/externalbugtracker/tests/test_gitlab.py
@@ -32,7 +32,6 @@ from lp.testing.layers import ZopelessDatabaseLayer, ZopelessLayer
 
 
 class TestGitLab(TestCase):
-
     layer = ZopelessLayer
 
     def setUp(self):
@@ -292,7 +291,6 @@ class TestGitLab(TestCase):
 
 
 class TestGitLabUpdateBugWatches(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     @responses.activate
diff --git a/lib/lp/bugs/interfaces/bugsupervisor.py b/lib/lp/bugs/interfaces/bugsupervisor.py
index 7d38ed5..48405fb 100644
--- a/lib/lp/bugs/interfaces/bugsupervisor.py
+++ b/lib/lp/bugs/interfaces/bugsupervisor.py
@@ -15,7 +15,6 @@ from lp.services.fields import PersonChoice
 
 
 class IHasBugSupervisor(Interface):
-
     bug_supervisor = exported(
         PersonChoice(
             title=_("Bug Supervisor"),
diff --git a/lib/lp/bugs/interfaces/bugtask.py b/lib/lp/bugs/interfaces/bugtask.py
index a8c4e45..3864b76 100644
--- a/lib/lp/bugs/interfaces/bugtask.py
+++ b/lib/lp/bugs/interfaces/bugtask.py
@@ -1301,7 +1301,6 @@ class IAddBugTaskForm(ILinkPackaging):
 
 
 class IAddBugTaskWithProductCreationForm(ILinkPackaging):
-
     bug_url = StrippedTextLine(
         title=_("Bug URL"),
         required=True,
diff --git a/lib/lp/bugs/interfaces/bugtasksearch.py b/lib/lp/bugs/interfaces/bugtasksearch.py
index f022a72..c78d1cc 100644
--- a/lib/lp/bugs/interfaces/bugtasksearch.py
+++ b/lib/lp/bugs/interfaces/bugtasksearch.py
@@ -191,7 +191,6 @@ class BugTaskSearchParams:
         ignore_privacy=False,
         ociproject=None,
     ):
-
         self.bug = bug
         self.searchtext = searchtext
         self.fast_searchtext = fast_searchtext
diff --git a/lib/lp/bugs/interfaces/bugtracker.py b/lib/lp/bugs/interfaces/bugtracker.py
index 3f383e3..6e88264 100644
--- a/lib/lp/bugs/interfaces/bugtracker.py
+++ b/lib/lp/bugs/interfaces/bugtracker.py
@@ -54,7 +54,6 @@ LOCATION_SCHEMES_ALLOWED = "http", "https", "mailto"
 
 
 class BugTrackerNameField(ContentNameField):
-
     errormessage = _("%s is already in use by another bugtracker.")
 
     @property
diff --git a/lib/lp/bugs/interfaces/personsubscriptioninfo.py b/lib/lp/bugs/interfaces/personsubscriptioninfo.py
index 7fd8dd8..47060e2 100644
--- a/lib/lp/bugs/interfaces/personsubscriptioninfo.py
+++ b/lib/lp/bugs/interfaces/personsubscriptioninfo.py
@@ -21,7 +21,6 @@ from lp.services.fields import BugField, PersonChoice
 
 
 class IAbstractSubscriptionInfo(Interface):
-
     bug = BugField(
         title=_("Bug"),
         readonly=True,
@@ -45,7 +44,6 @@ class IAbstractSubscriptionInfo(Interface):
 
 
 class IRealSubscriptionInfo(IAbstractSubscriptionInfo):
-
     subscription = Attribute(
         "The bug subscription.  Important attributes for our uses are the "
         "target and the bug_notification_level."
@@ -66,7 +64,6 @@ class IRealSubscriptionInfo(IAbstractSubscriptionInfo):
 
 
 class IVirtualSubscriptionInfo(IAbstractSubscriptionInfo):
-
     pillar = Attribute(
         """The pillar for the bugtask.  Useful for owner and
         bug_supervisor"""
@@ -76,7 +73,6 @@ class IVirtualSubscriptionInfo(IAbstractSubscriptionInfo):
 
 
 class IAbstractSubscriptionInfoCollection(Interface):
-
     count = Attribute("The total number of contained subscriptions.")
 
     personal = Attribute(
diff --git a/lib/lp/bugs/mail/tests/test_commands.py b/lib/lp/bugs/mail/tests/test_commands.py
index 2f775c0..10309a7 100644
--- a/lib/lp/bugs/mail/tests/test_commands.py
+++ b/lib/lp/bugs/mail/tests/test_commands.py
@@ -30,7 +30,6 @@ from lp.testing.layers import DatabaseFunctionalLayer, LaunchpadFunctionalLayer
 
 
 class AffectsEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test__splitPath_with_slashes(self):
@@ -360,7 +359,6 @@ class AffectsEmailCommandTestCase(TestCaseWithFactory):
 
 
 class BugEmailCommandTestCase(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_execute_bug_id(self):
@@ -406,7 +404,6 @@ class BugEmailCommandTestCase(TestCaseWithFactory):
 
 
 class PrivateEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug(self):
@@ -449,7 +446,6 @@ class PrivateEmailCommandTestCase(TestCaseWithFactory):
 
 
 class SecurityEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug(self):
@@ -476,7 +472,6 @@ class SecurityEmailCommandTestCase(TestCaseWithFactory):
 
 
 class InformationTypeEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug_params(self):
@@ -517,7 +512,6 @@ class InformationTypeEmailCommandTestCase(TestCaseWithFactory):
 
 
 class SubscribeEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug_with_user_name(self):
@@ -577,7 +571,6 @@ class SubscribeEmailCommandTestCase(TestCaseWithFactory):
 
 
 class UnsubscribeEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug_with_user_name(self):
@@ -618,7 +611,6 @@ class UnsubscribeEmailCommandTestCase(TestCaseWithFactory):
 
 
 class SummaryEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug(self):
@@ -643,7 +635,6 @@ class SummaryEmailCommandTestCase(TestCaseWithFactory):
 
 
 class DuplicateEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug(self):
@@ -670,7 +661,6 @@ class DuplicateEmailCommandTestCase(TestCaseWithFactory):
 
 
 class CVEEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug(self):
@@ -698,7 +688,6 @@ class CVEEmailCommandTestCase(TestCaseWithFactory):
 
 
 class TagEmailCommandTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_execute_bug(self):
diff --git a/lib/lp/bugs/model/bug.py b/lib/lp/bugs/model/bug.py
index 5f20232..4ff9c08 100644
--- a/lib/lp/bugs/model/bug.py
+++ b/lib/lp/bugs/model/bug.py
@@ -2082,6 +2082,7 @@ class Bug(SQLBase, InformationTypeMixin):
 
     def getNominations(self, target=None, nominations=None):
         """See `IBug`."""
+
         # Define the function used as a sort key.
         def by_bugtargetdisplayname(nomination):
             """Return the friendly sort key version of displayname."""
diff --git a/lib/lp/bugs/model/bugnomination.py b/lib/lp/bugs/model/bugnomination.py
index 0d3846c..53e6d99 100644
--- a/lib/lp/bugs/model/bugnomination.py
+++ b/lib/lp/bugs/model/bugnomination.py
@@ -39,7 +39,6 @@ from lp.services.features import getFeatureFlag
 
 @implementer(IBugNomination)
 class BugNomination(StormBase):
-
     __storm_table__ = "BugNomination"
 
     id = Int(primary=True)
diff --git a/lib/lp/bugs/model/bugtaskflat.py b/lib/lp/bugs/model/bugtaskflat.py
index 16ad071..833fe01 100644
--- a/lib/lp/bugs/model/bugtaskflat.py
+++ b/lib/lp/bugs/model/bugtaskflat.py
@@ -14,7 +14,6 @@ from lp.services.database.stormbase import StormBase
 
 
 class BugTaskFlat(StormBase):
-
     __storm_table__ = "BugTaskFlat"
 
     bugtask_id = Int(name="bugtask", primary=True)
diff --git a/lib/lp/bugs/model/tests/test_bug.py b/lib/lp/bugs/model/tests/test_bug.py
index 1084734..86c291c 100644
--- a/lib/lp/bugs/model/tests/test_bug.py
+++ b/lib/lp/bugs/model/tests/test_bug.py
@@ -42,7 +42,6 @@ from lp.testing.matchers import Equals, HasQueryCount, LessThan
 
 
 class TestBug(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_getNominationFor_sourcepackage(self):
@@ -678,7 +677,6 @@ class TestBug(TestCaseWithFactory):
 
 
 class TestBugPrivateAndSecurityRelatedUpdatesProject(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_setPrivate_subscribes_person_who_makes_bug_private(self):
@@ -865,7 +863,6 @@ class TestBugPrivateAndSecurityRelatedUpdatesProject(TestCaseWithFactory):
 
 
 class TestBugPrivacy(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_multipillar_proprietary_bugs_disallowed(self):
@@ -1062,7 +1059,6 @@ class TestBugPrivacy(TestCaseWithFactory):
 
 
 class TestBugPrivateAndSecurityRelatedUpdatesSpecialCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_transition_special_cased_for_ubuntu(self):
@@ -1089,7 +1085,6 @@ class TestBugPrivateAndSecurityRelatedUpdatesSpecialCase(TestCaseWithFactory):
 
 
 class TestBugActivityMethods(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/model/tests/test_bugsubscriptionfilter.py b/lib/lp/bugs/model/tests/test_bugsubscriptionfilter.py
index 28430c3..8acfa75 100644
--- a/lib/lp/bugs/model/tests/test_bugsubscriptionfilter.py
+++ b/lib/lp/bugs/model/tests/test_bugsubscriptionfilter.py
@@ -30,7 +30,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestBugSubscriptionFilter(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -391,7 +390,6 @@ class TestBugSubscriptionFilter(TestCaseWithFactory):
 
 
 class TestBugSubscriptionFilterPermissions(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -466,7 +464,6 @@ class TestBugSubscriptionFilterPermissions(TestCaseWithFactory):
 
 
 class TestBugSubscriptionFilterImportance(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -503,7 +500,6 @@ class TestBugSubscriptionFilterImportance(TestCaseWithFactory):
 
 
 class TestBugSubscriptionFilterStatus(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -538,7 +534,6 @@ class TestBugSubscriptionFilterStatus(TestCaseWithFactory):
 
 
 class TestBugSubscriptionFilterTag(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -586,7 +581,6 @@ class TestBugSubscriptionFilterTag(TestCaseWithFactory):
 
 
 class TestBugSubscriptionFilterInformationType(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/model/tests/test_bugsubscriptioninfo.py b/lib/lp/bugs/model/tests/test_bugsubscriptioninfo.py
index 34b9986..2497c45 100644
--- a/lib/lp/bugs/model/tests/test_bugsubscriptioninfo.py
+++ b/lib/lp/bugs/model/tests/test_bugsubscriptioninfo.py
@@ -125,7 +125,6 @@ class TestSubscriptionRelatedSets(TestCaseWithFactory):
 
 
 class TestBugSubscriptionInfo(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -442,7 +441,6 @@ class TestBugSubscriptionInfo(TestCaseWithFactory):
 
 
 class TestBugSubscriptionInfoPermissions(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test(self):
@@ -467,7 +465,6 @@ class TestBugSubscriptionInfoPermissions(TestCaseWithFactory):
 
 
 class TestBugSubscriptionInfoQueries(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/model/tests/test_bugsummary.py b/lib/lp/bugs/model/tests/test_bugsummary.py
index 459a6f0..cfa52d1 100644
--- a/lib/lp/bugs/model/tests/test_bugsummary.py
+++ b/lib/lp/bugs/model/tests/test_bugsummary.py
@@ -23,7 +23,6 @@ from lp.testing.layers import LaunchpadZopelessLayer
 
 
 class TestBugSummary(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/model/tests/test_bugtask.py b/lib/lp/bugs/model/tests/test_bugtask.py
index c3eb248..77e979b 100644
--- a/lib/lp/bugs/model/tests/test_bugtask.py
+++ b/lib/lp/bugs/model/tests/test_bugtask.py
@@ -960,7 +960,6 @@ class TestBugTaskPrivacy(TestCaseWithFactory):
 
 
 class TestBugTaskDelta(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -1182,7 +1181,6 @@ class TestSimilarBugs(TestCaseWithFactory):
 
 
 class TestBugTaskPermissionsToSetAssigneeMixin:
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self, *args, **kwargs):
@@ -1663,7 +1661,6 @@ class TestBugTaskStatuses(TestCase):
 
 
 class TestBugTaskContributor(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_non_contributor(self):
@@ -3337,7 +3334,6 @@ class ValidateTargetMixin:
 
 
 class TestValidateTarget(TestCaseWithFactory, ValidateTargetMixin):
-
     layer = DatabaseFunctionalLayer
 
     multi_tenant_test_one_task_only = False
@@ -3590,7 +3586,6 @@ class TestValidateTarget(TestCaseWithFactory, ValidateTargetMixin):
 
 
 class TestValidateNewTarget(TestCaseWithFactory, ValidateTargetMixin):
-
     layer = DatabaseFunctionalLayer
 
     multi_tenant_test_one_task_only = True
@@ -3689,7 +3684,6 @@ class TestWebservice(TestCaseWithFactory):
 
 
 class TestBugTaskUserHasBugSupervisorPrivileges(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -3780,7 +3774,6 @@ class TestBugTaskUserHasBugSupervisorPrivileges(TestCaseWithFactory):
 
 
 class TestBugTaskUserHasBugSupervisorPrivilegesContext(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def assert_userHasBugSupervisorPrivilegesContext(self, obj):
diff --git a/lib/lp/bugs/model/tests/test_bugtasksearch.py b/lib/lp/bugs/model/tests/test_bugtasksearch.py
index 918dbdd..e16a56b 100644
--- a/lib/lp/bugs/model/tests/test_bugtasksearch.py
+++ b/lib/lp/bugs/model/tests/test_bugtasksearch.py
@@ -124,7 +124,6 @@ class TestProcessOrderBy(TestCase):
 
 
 class SearchTestBase:
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -785,7 +784,6 @@ class TargetTests:
 
 
 class DeactivatedProductBugTaskTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -1867,7 +1865,6 @@ class QueryBugIDs:
 
 
 class TestMilestoneDueDateFiltering(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_milestone_date_filters(self):
@@ -2364,7 +2361,6 @@ class TestBugTaskTagSearchClauses(TestCase):
 
 
 class TestBugTaskSearch(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def login(self):
@@ -2520,7 +2516,6 @@ class TestBugTaskSearch(TestCaseWithFactory):
 
 
 class BugTaskSetSearchTest(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_explicit_blueprint_specified(self):
@@ -2567,7 +2562,6 @@ class TargetLessTestCase(TestCaseWithFactory):
 
 
 class BaseGetBugPrivacyFilterTermsTests:
-
     layer = DatabaseFunctionalLayer
 
     def test_public(self):
diff --git a/lib/lp/bugs/model/tests/test_personsubscriptioninfo.py b/lib/lp/bugs/model/tests/test_personsubscriptioninfo.py
index 7011826..2671e9b 100644
--- a/lib/lp/bugs/model/tests/test_personsubscriptioninfo.py
+++ b/lib/lp/bugs/model/tests/test_personsubscriptioninfo.py
@@ -25,7 +25,6 @@ from lp.testing.matchers import HasQueryCount, Provides
 
 
 class TestPersonSubscriptionInfo(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/model/tests/test_vulnerability.py b/lib/lp/bugs/model/tests/test_vulnerability.py
index 138e23d..184b5d7 100644
--- a/lib/lp/bugs/model/tests/test_vulnerability.py
+++ b/lib/lp/bugs/model/tests/test_vulnerability.py
@@ -47,7 +47,6 @@ def grant_access_to_non_public_vulnerability(vulnerability, person):
 
 
 class TestVulnerability(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -490,7 +489,6 @@ class TestVulnerability(TestCaseWithFactory):
 
 
 class TestVulnerabilityActivity(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_vulnerability_activity_changes(self):
@@ -506,7 +504,6 @@ class TestVulnerabilityActivity(TestCaseWithFactory):
 
 
 class TestVulnerabilitySet(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_VulnerabilitySet_implements_IVulnerabilitySet(self):
diff --git a/lib/lp/bugs/model/tests/test_vulnerabilitysubscription.py b/lib/lp/bugs/model/tests/test_vulnerabilitysubscription.py
index 6d8124c..bcbb63d 100644
--- a/lib/lp/bugs/model/tests/test_vulnerabilitysubscription.py
+++ b/lib/lp/bugs/model/tests/test_vulnerabilitysubscription.py
@@ -14,7 +14,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestVulnerabilitySubscription(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_VulnerabilitySubscription_implements_its_interface(self):
diff --git a/lib/lp/bugs/publisher.py b/lib/lp/bugs/publisher.py
index bdbb00a..dbdc528 100644
--- a/lib/lp/bugs/publisher.py
+++ b/lib/lp/bugs/publisher.py
@@ -25,7 +25,6 @@ from lp.services.webapp.servers import (
 
 @implementer(IFacet)
 class BugsFacet:
-
     name = "bugs"
     rootsite = "bugs"
     text = "Bugs"
diff --git a/lib/lp/bugs/scripts/bugsummaryrebuild.py b/lib/lp/bugs/scripts/bugsummaryrebuild.py
index 21003b4..088ce97 100644
--- a/lib/lp/bugs/scripts/bugsummaryrebuild.py
+++ b/lib/lp/bugs/scripts/bugsummaryrebuild.py
@@ -427,7 +427,6 @@ def calculate_bugsummary_rows(target):
 
 
 class BugSummaryRebuildTunableLoop(TunableLoop):
-
     maximum_chunk_size = 100
 
     def __init__(self, log, dry_run, abort_time=None):
diff --git a/lib/lp/bugs/scripts/checkwatches/core.py b/lib/lp/bugs/scripts/checkwatches/core.py
index 63a4546..9589bd4 100644
--- a/lib/lp/bugs/scripts/checkwatches/core.py
+++ b/lib/lp/bugs/scripts/checkwatches/core.py
@@ -758,7 +758,7 @@ class SerialScheduler(BaseScheduler):
 
     def run(self):
         jobs, self._jobs = self._jobs[:], []
-        for (func, args, kwargs) in jobs:
+        for func, args, kwargs in jobs:
             func(*args, **kwargs)
 
 
diff --git a/lib/lp/bugs/scripts/checkwatches/tests/test_base.py b/lib/lp/bugs/scripts/checkwatches/tests/test_base.py
index bf6c274..791031c 100644
--- a/lib/lp/bugs/scripts/checkwatches/tests/test_base.py
+++ b/lib/lp/bugs/scripts/checkwatches/tests/test_base.py
@@ -31,7 +31,6 @@ class StubTransactionManager:
 
 
 class TestWorkingBase(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
@@ -147,7 +146,6 @@ class TestWorkingBase(TestCaseWithFactory):
 
 
 class TestWorkingBaseErrorReporting(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     @contextmanager
diff --git a/lib/lp/bugs/scripts/checkwatches/tests/test_core.py b/lib/lp/bugs/scripts/checkwatches/tests/test_core.py
index 7b6315c..6a73e33 100644
--- a/lib/lp/bugs/scripts/checkwatches/tests/test_core.py
+++ b/lib/lp/bugs/scripts/checkwatches/tests/test_core.py
@@ -78,7 +78,6 @@ class NoBugWatchesByRemoteBugUpdater(RemoteBugUpdater):
 
 
 class TestCheckwatchesWithSyncableGnomeProducts(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
@@ -166,7 +165,6 @@ class TestCheckwatchesWithSyncableGnomeProducts(TestCaseWithFactory):
 
 
 class BrokenCheckwatchesMaster(CheckwatchesMaster):
-
     error_code = None
 
     def _getExternalBugTrackersAndWatches(self, bug_tracker, bug_watches):
@@ -176,7 +174,6 @@ class BrokenCheckwatchesMaster(CheckwatchesMaster):
 
 
 class TestCheckwatchesMaster(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/scripts/checkwatches/tests/test_remotebugupdater.py b/lib/lp/bugs/scripts/checkwatches/tests/test_remotebugupdater.py
index 4e322d9..0f36089 100644
--- a/lib/lp/bugs/scripts/checkwatches/tests/test_remotebugupdater.py
+++ b/lib/lp/bugs/scripts/checkwatches/tests/test_remotebugupdater.py
@@ -36,7 +36,6 @@ class ImportanceConvertingExternalBugTracker(TestExternalBugTracker):
 
 
 class RemoteBugUpdaterTestCase(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def makeUpdater(
diff --git a/lib/lp/bugs/scripts/tests/test_bugnotification.py b/lib/lp/bugs/scripts/tests/test_bugnotification.py
index a863751..99d9197 100644
--- a/lib/lp/bugs/scripts/tests/test_bugnotification.py
+++ b/lib/lp/bugs/scripts/tests/test_bugnotification.py
@@ -672,7 +672,6 @@ class TestNotificationBatches(unittest.TestCase):
 
 
 class EmailNotificationTestBase(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
@@ -726,7 +725,6 @@ class EmailNotificationTestBase(TestCaseWithFactory):
 
 
 class EmailNotificationsBugMixin:
-
     change_class = None  # type: Optional[Type[Any]]
     change_name = None  # type: Optional[str]
     old = None  # type: Any
@@ -820,7 +818,6 @@ class EmailNotificationsBugTaskMixin(EmailNotificationsBugMixin):
 
 
 class EmailNotificationsAddedRemovedMixin:
-
     old = new = added_message = removed_message = b""
 
     def add(self, item):
@@ -854,7 +851,6 @@ class EmailNotificationsAddedRemovedMixin:
 class TestEmailNotificationsBugTitle(
     EmailNotificationsBugMixin, EmailNotificationTestBase
 ):
-
     change_class = BugTitleChange
     change_name = "title"
     old = "Old summary"
@@ -866,7 +862,6 @@ class TestEmailNotificationsBugTitle(
 class TestEmailNotificationsBugTags(
     EmailNotificationsBugMixin, EmailNotificationTestBase
 ):
-
     change_class = BugTagsChange
     change_name = "tags"
     old = ["foo", "bar", "baz"]
@@ -885,7 +880,6 @@ class TestEmailNotificationsBugTags(
 class TestEmailNotificationsBugDuplicate(
     EmailNotificationsBugNotRequiredMixin, EmailNotificationTestBase
 ):
-
     change_class = BugDuplicateChange
     change_name = "duplicateof"
     unexpected_bytes = b"duplicate"
@@ -902,7 +896,6 @@ class TestEmailNotificationsBugDuplicate(
 class TestEmailNotificationsBugTaskStatus(
     EmailNotificationsBugTaskMixin, EmailNotificationTestBase
 ):
-
     change_class = BugTaskStatusChange
     change_name = "status"
     old = BugTaskStatus.TRIAGED
@@ -914,7 +907,6 @@ class TestEmailNotificationsBugTaskStatus(
 class TestEmailNotificationsBugWatch(
     EmailNotificationsAddedRemovedMixin, EmailNotificationTestBase
 ):
-
     # Note that this is for bugwatches added to bugs.  Bugwatches added
     # to bugtasks are separate animals AIUI, and we don't try to combine
     # them here for notifications.  Bugtasks have only zero or one
@@ -957,7 +949,6 @@ class TestEmailNotificationsBugWatch(
 class TestEmailNotificationsBranch(
     EmailNotificationsAddedRemovedMixin, EmailNotificationTestBase
 ):
-
     added_message = b"** Branch linked:"
     removed_message = b"** Branch unlinked:"
 
@@ -988,7 +979,6 @@ class TestEmailNotificationsBranch(
 class TestEmailNotificationsCVE(
     EmailNotificationsAddedRemovedMixin, EmailNotificationTestBase
 ):
-
     added_message = b"** CVE added:"
     removed_message = b"** CVE removed:"
 
@@ -1015,7 +1005,6 @@ class TestEmailNotificationsCVE(
 class TestEmailNotificationsAttachments(
     EmailNotificationsAddedRemovedMixin, EmailNotificationTestBase
 ):
-
     added_message = b"** Attachment added:"
     removed_message = b"** Attachment removed:"
 
@@ -1316,7 +1305,6 @@ class TestEmailNotificationsWithFiltersWhenBugCreated(TestCaseWithFactory):
 
 
 class TestManageNotificationsMessage(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def test_manage_notifications_message_is_included(self):
@@ -1355,7 +1343,6 @@ class TestNotificationSignatureSeparator(TestCase):
 
 
 class TestExpandedNotificationFooters(EmailNotificationTestBase):
-
     layer = LaunchpadZopelessLayer
 
     def test_expanded_footer(self):
@@ -1392,7 +1379,6 @@ class TestExpandedNotificationFooters(EmailNotificationTestBase):
 
 
 class TestDeferredNotifications(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
@@ -1448,7 +1434,6 @@ class BrokenMailer(TestMailer):
 
 
 class TestSendBugNotifications(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
@@ -1575,7 +1560,6 @@ class TestSendBugNotifications(TestCaseWithFactory):
         )
 
     def test_team_subscription_with_multiple_filters(self):
-
         team_owner = self.factory.makePerson(email="[e-mail]")
 
         bug_watcher = self.factory.makePerson(
diff --git a/lib/lp/bugs/scripts/tests/test_bugsummaryrebuild.py b/lib/lp/bugs/scripts/tests/test_bugsummaryrebuild.py
index cf78d8c..0449135 100644
--- a/lib/lp/bugs/scripts/tests/test_bugsummaryrebuild.py
+++ b/lib/lp/bugs/scripts/tests/test_bugsummaryrebuild.py
@@ -74,7 +74,6 @@ def create_tasks(factory):
 
 
 class TestBugSummaryRebuild(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_get_bugsummary_targets(self):
@@ -191,7 +190,6 @@ class TestBugSummaryRebuild(TestCaseWithFactory):
 
 
 class TestGetBugSummaryRows(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_get_bugsummary_rows(self):
@@ -208,7 +206,6 @@ class TestGetBugSummaryRows(TestCaseWithFactory):
 
 
 class TestCalculateBugSummaryRows(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def test_public_untagged(self):
@@ -498,7 +495,6 @@ class TestCalculateBugSummaryRows(TestCaseWithFactory):
 
 
 class TestFormatTarget(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_product(self):
diff --git a/lib/lp/bugs/scripts/tests/test_uct.py b/lib/lp/bugs/scripts/tests/test_uct.py
index 737a89f..c6aa91f 100644
--- a/lib/lp/bugs/scripts/tests/test_uct.py
+++ b/lib/lp/bugs/scripts/tests/test_uct.py
@@ -30,7 +30,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestUCTRecord(TestCase):
-
     maxDiff = None
 
     def test_load_save(self):
@@ -173,7 +172,6 @@ class TestUCTRecord(TestCase):
 
 
 class TestCVE(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
     maxDiff = None
 
@@ -508,7 +506,6 @@ class TestCVE(TestCaseWithFactory):
 
 
 class TestUCTImporterExporter(TestCaseWithFactory):
-
     maxDiff = None
     layer = ZopelessDatabaseLayer
 
diff --git a/lib/lp/bugs/scripts/uct/models.py b/lib/lp/bugs/scripts/uct/models.py
index d9f92a2..71f6c74 100644
--- a/lib/lp/bugs/scripts/uct/models.py
+++ b/lib/lp/bugs/scripts/uct/models.py
@@ -585,7 +585,6 @@ class CVE:
             )
 
             for uct_package_status in uct_package.statuses:
-
                 if uct_package_status.status not in cls.BUG_TASK_STATUS_MAP:
                     logger.warning(
                         "Can't find a suitable bug task status for %s",
diff --git a/lib/lp/bugs/security.py b/lib/lp/bugs/security.py
index 11d74e9..4d961ac 100644
--- a/lib/lp/bugs/security.py
+++ b/lib/lp/bugs/security.py
@@ -324,7 +324,6 @@ class ViewBugActivity(DelegatedAuthorization):
 
 
 class ViewBugSubscription(AnonymousAuthorization):
-
     usedfor = IBugSubscription
 
 
@@ -350,7 +349,6 @@ class EditBugSubscription(AuthorizationBase):
 
 
 class ViewBugMessage(AnonymousAuthorization):
-
     usedfor = IMessage
 
 
diff --git a/lib/lp/bugs/subscribers/tests/test_bug.py b/lib/lp/bugs/subscribers/tests/test_bug.py
index 7749c3b..f08f31b 100644
--- a/lib/lp/bugs/subscribers/tests/test_bug.py
+++ b/lib/lp/bugs/subscribers/tests/test_bug.py
@@ -23,7 +23,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class BugSubscriberTestCase(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/tests/test_apportjob.py b/lib/lp/bugs/tests/test_apportjob.py
index 96cd204..c22cfed 100644
--- a/lib/lp/bugs/tests/test_apportjob.py
+++ b/lib/lp/bugs/tests/test_apportjob.py
@@ -334,7 +334,6 @@ class ProcessApportBlobJobTestCase(TestCaseWithFactory):
 
 
 class TestViaCelery(TestCaseWithFactory):
-
     layer = CeleryJobLayer
 
     def test_ProcessApportBlobJob(self):
diff --git a/lib/lp/bugs/tests/test_bug_messages_webservice.py b/lib/lp/bugs/tests/test_bug_messages_webservice.py
index d8a77a1..0e220ed 100644
--- a/lib/lp/bugs/tests/test_bug_messages_webservice.py
+++ b/lib/lp/bugs/tests/test_bug_messages_webservice.py
@@ -84,7 +84,6 @@ class TestMessageTraversal(TestCaseWithFactory):
 
 
 class TestBugMessage(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_attachments(self):
diff --git a/lib/lp/bugs/tests/test_bug_notification_recipients.py b/lib/lp/bugs/tests/test_bug_notification_recipients.py
index 7e99241..30f5a8f 100644
--- a/lib/lp/bugs/tests/test_bug_notification_recipients.py
+++ b/lib/lp/bugs/tests/test_bug_notification_recipients.py
@@ -23,7 +23,6 @@ from lp.testing.matchers import HasQueryCount
 
 
 class TestBugNotificationRecipients(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def getFreshRecipients(self, bug):
diff --git a/lib/lp/bugs/tests/test_bugbranch.py b/lib/lp/bugs/tests/test_bugbranch.py
index 77a0934..76cacdc 100644
--- a/lib/lp/bugs/tests/test_bugbranch.py
+++ b/lib/lp/bugs/tests/test_bugbranch.py
@@ -19,7 +19,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestBugBranchSet(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_bugbranchset_provides_IBugBranchSet(self):
@@ -148,7 +147,6 @@ class TestBugBranchSet(TestCaseWithFactory):
 
 
 class TestBugBranch(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/tests/test_bugchanges.py b/lib/lp/bugs/tests/test_bugchanges.py
index 3c55ed3..1067d89 100644
--- a/lib/lp/bugs/tests/test_bugchanges.py
+++ b/lib/lp/bugs/tests/test_bugchanges.py
@@ -31,7 +31,6 @@ from lp.testing.pages import webservice_for_person
 
 
 class TestBugChanges(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/tests/test_bugnomination.py b/lib/lp/bugs/tests/test_bugnomination.py
index 7fa1c76..19c0a15 100644
--- a/lib/lp/bugs/tests/test_bugnomination.py
+++ b/lib/lp/bugs/tests/test_bugnomination.py
@@ -27,7 +27,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class BugNominationTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_implementation(self):
@@ -307,7 +306,6 @@ class TestBugCanBeNominatedForDistroSeries(
 
 
 class TestCanApprove(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_normal_user_cannot_approve(self):
@@ -458,7 +456,6 @@ class TestCanApprove(TestCaseWithFactory):
 
 
 class BugNominationSetTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_get(self):
diff --git a/lib/lp/bugs/tests/test_bugs_webservice.py b/lib/lp/bugs/tests/test_bugs_webservice.py
index 29be4de..6851520 100644
--- a/lib/lp/bugs/tests/test_bugs_webservice.py
+++ b/lib/lp/bugs/tests/test_bugs_webservice.py
@@ -186,7 +186,6 @@ class TestBugCommentRepresentation(TestCaseWithFactory):
 
 
 class TestBugScaling(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_attachments_query_counts_constant(self):
@@ -265,7 +264,6 @@ class TestBugScaling(TestCaseWithFactory):
 
 
 class TestBugMessages(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -359,7 +357,6 @@ class TestPostBugWithLargeCollections(TestCaseWithFactory):
 
 
 class TestErrorHandling(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_add_duplicate_bugtask_for_project_gives_bad_request(self):
@@ -425,7 +422,6 @@ class TestErrorHandling(TestCaseWithFactory):
 
 
 class BugSetTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def makeAPITarget(self, bug_policy):
@@ -481,7 +477,6 @@ class BugSetTestCase(TestCaseWithFactory):
 
 
 class TestBugDateLastUpdated(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def make_old_bug(self):
diff --git a/lib/lp/bugs/tests/test_bugtaskfilter.py b/lib/lp/bugs/tests/test_bugtaskfilter.py
index 6c96281..fc87206 100644
--- a/lib/lp/bugs/tests/test_bugtaskfilter.py
+++ b/lib/lp/bugs/tests/test_bugtaskfilter.py
@@ -12,7 +12,6 @@ from lp.testing.matchers import HasQueryCount
 
 
 class TestFilterBugTasksByContext(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_simple_case(self):
diff --git a/lib/lp/bugs/tests/test_bugtaskflat_triggers.py b/lib/lp/bugs/tests/test_bugtaskflat_triggers.py
index 8330111..c62f7eb 100644
--- a/lib/lp/bugs/tests/test_bugtaskflat_triggers.py
+++ b/lib/lp/bugs/tests/test_bugtaskflat_triggers.py
@@ -138,7 +138,6 @@ class BugTaskFlatTestMixin(TestCaseWithFactory):
 
 
 class TestBugTaskFlatten(BugTaskFlatTestMixin):
-
     layer = DatabaseFunctionalLayer
 
     def test_create(self):
@@ -304,7 +303,6 @@ class TestBugTaskFlatten(BugTaskFlatTestMixin):
 
 
 class TestBugTaskFlatTriggers(BugTaskFlatTestMixin):
-
     layer = DatabaseFunctionalLayer
 
     def test_bugtask_create(self):
diff --git a/lib/lp/bugs/tests/test_bugtracker.py b/lib/lp/bugs/tests/test_bugtracker.py
index 3d60dd7..6bb19ca 100644
--- a/lib/lp/bugs/tests/test_bugtracker.py
+++ b/lib/lp/bugs/tests/test_bugtracker.py
@@ -37,7 +37,6 @@ from lp.testing.sampledata import ADMIN_EMAIL
 
 
 class TestBugTrackerSet(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_trackers(self):
diff --git a/lib/lp/bugs/tests/test_bugtracker_components.py b/lib/lp/bugs/tests/test_bugtracker_components.py
index 3194101..3da7150 100644
--- a/lib/lp/bugs/tests/test_bugtracker_components.py
+++ b/lib/lp/bugs/tests/test_bugtracker_components.py
@@ -13,7 +13,6 @@ __all__ = []  # type: List[str]
 
 
 class BugTrackerComponentTestCase(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self, *args, **kwargs):
@@ -99,7 +98,6 @@ class BugTrackerComponentTestCase(TestCaseWithFactory):
 
 
 class TestBugTrackerWithComponents(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -186,7 +184,6 @@ class TestBugTrackerWithComponents(TestCaseWithFactory):
 
 
 class TestWebservice(TestCaseWithFactory):
-
     layer = AppServerLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/tests/test_bugtracker_vocabulary.py b/lib/lp/bugs/tests/test_bugtracker_vocabulary.py
index 57c8bfb..7b01697 100644
--- a/lib/lp/bugs/tests/test_bugtracker_vocabulary.py
+++ b/lib/lp/bugs/tests/test_bugtracker_vocabulary.py
@@ -11,7 +11,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestBugTrackerVocabulary(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -94,7 +93,6 @@ class TestBugTrackerVocabulary(TestCaseWithFactory):
 
 
 class TestWebBugTrackerVocabulary(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/tests/test_bugwatch.py b/lib/lp/bugs/tests/test_bugwatch.py
index 8cf900d..a684b0f 100644
--- a/lib/lp/bugs/tests/test_bugwatch.py
+++ b/lib/lp/bugs/tests/test_bugwatch.py
@@ -404,7 +404,6 @@ class EmailAddressExtractBugTrackerAndBugTest(ExtractBugTrackerAndBugTest):
 
 
 class TestBugWatch(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def test_bugtasks_to_update(self):
@@ -671,7 +670,6 @@ class TestBugWatchSetBulkOperations(TestCaseWithFactory):
 
 
 class TestBugWatchBugTasks(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -725,7 +723,6 @@ class TestBugWatchActivityPruner(TestCaseWithFactory):
 
 
 class TestBugWatchResetting(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/tests/test_bzremotecomponentfinder.py b/lib/lp/bugs/tests/test_bzremotecomponentfinder.py
index 78abb69..47480f2 100644
--- a/lib/lp/bugs/tests/test_bzremotecomponentfinder.py
+++ b/lib/lp/bugs/tests/test_bzremotecomponentfinder.py
@@ -33,7 +33,6 @@ def read_test_file(name):
 
 
 class TestBugzillaRemoteComponentScraper(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -89,7 +88,6 @@ class TestBugzillaRemoteComponentScraper(TestCaseWithFactory):
 
 
 class TestBugzillaRemoteComponentFinder(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/tests/test_cve.py b/lib/lp/bugs/tests/test_cve.py
index c3e7c4f..e444ead 100644
--- a/lib/lp/bugs/tests/test_cve.py
+++ b/lib/lp/bugs/tests/test_cve.py
@@ -110,7 +110,6 @@ class TestCveSet(TestCaseWithFactory):
 
 
 class TestBugLinks(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_link_and_unlink(self):
diff --git a/lib/lp/bugs/tests/test_structuralsubscription.py b/lib/lp/bugs/tests/test_structuralsubscription.py
index d839266..ce1f712 100644
--- a/lib/lp/bugs/tests/test_structuralsubscription.py
+++ b/lib/lp/bugs/tests/test_structuralsubscription.py
@@ -36,7 +36,6 @@ RESULT_SETS = ResultSet, EmptyResultSet, DecoratedResultSet
 
 
 class TestStructuralSubscription(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -485,7 +484,6 @@ class TestStructuralSubscriptionFiltersForProductSeries(
 
 
 class TestGetStructuralSubscriptionTargets(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_product_target(self):
@@ -571,7 +569,6 @@ class TestGetStructuralSubscriptionTargets(TestCaseWithFactory):
 
 
 class TestGetStructuralSubscriptionsForBug(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -677,7 +674,6 @@ class TestGetStructuralSubscriptionsForBug(TestCaseWithFactory):
 
 
 class TestGetStructuralSubscriptions(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def make_product_with_bug(self):
@@ -772,7 +768,6 @@ class TestGetStructuralSubscriptions(TestCaseWithFactory):
 
 
 class TestGetStructuralSubscribers(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def make_product_with_bug(self):
diff --git a/lib/lp/bugs/tests/test_structuralsubscriptiontarget.py b/lib/lp/bugs/tests/test_structuralsubscriptiontarget.py
index a9ee89a..9eb6933 100644
--- a/lib/lp/bugs/tests/test_structuralsubscriptiontarget.py
+++ b/lib/lp/bugs/tests/test_structuralsubscriptiontarget.py
@@ -190,7 +190,6 @@ class UnrestrictedStructuralSubscriptionTestBase(
 class TestStructuralSubscriptionForDistro(
     RestrictedStructuralSubscriptionTestBase, TestCaseWithFactory
 ):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -266,7 +265,6 @@ class TestStructuralSubscriptionForDistro(
 class TestStructuralSubscriptionForProduct(
     UnrestrictedStructuralSubscriptionTestBase, TestCaseWithFactory
 ):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -277,7 +275,6 @@ class TestStructuralSubscriptionForProduct(
 class TestStructuralSubscriptionForDistroSourcePackage(
     UnrestrictedStructuralSubscriptionTestBase, TestCaseWithFactory
 ):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -289,7 +286,6 @@ class TestStructuralSubscriptionForDistroSourcePackage(
 class TestStructuralSubscriptionForMilestone(
     UnrestrictedStructuralSubscriptionTestBase, TestCaseWithFactory
 ):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -301,7 +297,6 @@ class TestStructuralSubscriptionForMilestone(
 class TestStructuralSubscriptionForDistroSeries(
     UnrestrictedStructuralSubscriptionTestBase, TestCaseWithFactory
 ):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -313,7 +308,6 @@ class TestStructuralSubscriptionForDistroSeries(
 class TestStructuralSubscriptionForProjectGroup(
     UnrestrictedStructuralSubscriptionTestBase, TestCaseWithFactory
 ):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -325,7 +319,6 @@ class TestStructuralSubscriptionForProjectGroup(
 class TestStructuralSubscriptionForProductSeries(
     UnrestrictedStructuralSubscriptionTestBase, TestCaseWithFactory
 ):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -477,7 +470,6 @@ class TestStructuralSubscriptionTargetHelper(TestCaseWithFactory):
 
 
 class TestGetAllStructuralSubscriptionsForTarget(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/bugs/tests/test_vulnerability.py b/lib/lp/bugs/tests/test_vulnerability.py
index 3289b07..0cec967 100644
--- a/lib/lp/bugs/tests/test_vulnerability.py
+++ b/lib/lp/bugs/tests/test_vulnerability.py
@@ -19,7 +19,6 @@ from lp.testing.pages import webservice_for_person
 
 
 class TestVulnerabilityWebService(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_editing_an_existing_vulnerability_attributes(self):
diff --git a/lib/lp/bugs/tests/test_yuitests.py b/lib/lp/bugs/tests/test_yuitests.py
index 431fbd9..7ba7c62 100644
--- a/lib/lp/bugs/tests/test_yuitests.py
+++ b/lib/lp/bugs/tests/test_yuitests.py
@@ -11,7 +11,6 @@ __all__ = []  # type: List[str]
 
 
 class BugsYUIUnitTestCase(YUIUnitTestCase):
-
     layer = YUITestLayer
     suite_name = "BugsYUIUnitTests"
 
diff --git a/lib/lp/bugs/vocabularies.py b/lib/lp/bugs/vocabularies.py
index d6480bf..9b337e0 100644
--- a/lib/lp/bugs/vocabularies.py
+++ b/lib/lp/bugs/vocabularies.py
@@ -86,7 +86,6 @@ class UsesBugsDistributionVocabulary(DistributionVocabulary):
 
 
 class BugVocabulary(SQLObjectVocabularyBase):
-
     _table = Bug
     _orderBy = "id"
 
diff --git a/lib/lp/buildmaster/browser/tests/test_builder.py b/lib/lp/buildmaster/browser/tests/test_builder.py
index e74b3ed..a582dc7 100644
--- a/lib/lp/buildmaster/browser/tests/test_builder.py
+++ b/lib/lp/buildmaster/browser/tests/test_builder.py
@@ -38,7 +38,6 @@ def builders_homepage_render():
 
 
 class TestBuilderSetNavigation(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_binary_package_build_api_redirects(self):
@@ -122,7 +121,6 @@ class TestBuilderSetNavigation(TestCaseWithFactory):
 
 
 class TestBuildersHomepage(TestCaseWithFactory, BuildCreationMixin):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/buildmaster/browser/tests/test_builder_views.py b/lib/lp/buildmaster/browser/tests/test_builder_views.py
index 8bfb548..98446e2 100644
--- a/lib/lp/buildmaster/browser/tests/test_builder_views.py
+++ b/lib/lp/buildmaster/browser/tests/test_builder_views.py
@@ -34,7 +34,6 @@ from lp.translations.interfaces.translationtemplatesbuild import (
 
 
 class TestgetSpecificJobs(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def createTranslationTemplateBuild(self):
@@ -158,7 +157,6 @@ class BuildCreationMixin:
 
 
 class TestBuilderHistoryView(TestCaseWithFactory, BuildCreationMixin):
-
     layer = LaunchpadFunctionalLayer
 
     nb_objects = 2
diff --git a/lib/lp/buildmaster/downloader.py b/lib/lp/buildmaster/downloader.py
index 4c9fa13..68aab4d 100644
--- a/lib/lp/buildmaster/downloader.py
+++ b/lib/lp/buildmaster/downloader.py
@@ -25,7 +25,6 @@ from twisted.protocols import amp
 
 
 class DownloadCommand(amp.Command):
-
     arguments = [
         (b"file_url", amp.Unicode()),
         (b"path_to_write", amp.Unicode()),
@@ -39,7 +38,6 @@ class DownloadCommand(amp.Command):
 
 
 class RequestProxyTokenCommand(amp.Command):
-
     arguments = [
         (b"url", amp.Unicode()),
         (b"auth_header", amp.String()),
diff --git a/lib/lp/buildmaster/enums.py b/lib/lp/buildmaster/enums.py
index ad32e14..ee1d90c 100644
--- a/lib/lp/buildmaster/enums.py
+++ b/lib/lp/buildmaster/enums.py
@@ -286,7 +286,6 @@ class BuildQueueStatus(DBEnumeratedType):
 
 
 class BuilderCleanStatus(DBEnumeratedType):
-
     CLEAN = DBItem(
         0,
         """
@@ -316,7 +315,6 @@ class BuilderCleanStatus(DBEnumeratedType):
 
 
 class BuilderResetProtocol(DBEnumeratedType):
-
     PROTO_1_1 = DBItem(
         11,
         """
diff --git a/lib/lp/buildmaster/interfaces/builder.py b/lib/lp/buildmaster/interfaces/builder.py
index afca0b3..d81c01c 100644
--- a/lib/lp/buildmaster/interfaces/builder.py
+++ b/lib/lp/buildmaster/interfaces/builder.py
@@ -119,7 +119,6 @@ class IBuilderModerateAttributes(Interface):
 
 
 class IBuilderView(IHasBuildRecords, IHasOwner):
-
     id = Attribute("Builder identifier")
 
     processor = exported(
diff --git a/lib/lp/buildmaster/interfaces/buildfarmjobbehaviour.py b/lib/lp/buildmaster/interfaces/buildfarmjobbehaviour.py
index 7fdf254..bdb07b6 100644
--- a/lib/lp/buildmaster/interfaces/buildfarmjobbehaviour.py
+++ b/lib/lp/buildmaster/interfaces/buildfarmjobbehaviour.py
@@ -149,7 +149,6 @@ BuildArgs = TypedDict(
 
 
 class IBuildFarmJobBehaviour(Interface):
-
     builder_type = Attribute(
         "The name of the builder type to use for this build, corresponding "
         "to a launchpad-buildd build manager tag."
diff --git a/lib/lp/buildmaster/manager.py b/lib/lp/buildmaster/manager.py
index 17c90a6..7f2b870 100644
--- a/lib/lp/buildmaster/manager.py
+++ b/lib/lp/buildmaster/manager.py
@@ -166,7 +166,6 @@ class PrefetchedBuildCandidates:
 
 
 class BaseBuilderFactory:
-
     date_updated = None
 
     def update(self):
diff --git a/lib/lp/buildmaster/queuedepth.py b/lib/lp/buildmaster/queuedepth.py
index 702af11..05adfa1 100644
--- a/lib/lp/buildmaster/queuedepth.py
+++ b/lib/lp/buildmaster/queuedepth.py
@@ -228,6 +228,7 @@ def estimate_job_delay(bq, builder_stats):
     :return: An integer value holding the sum of delays (in seconds)
         caused by the jobs that are ahead of and competing with the JOI.
     """
+
     # XXX: This is broken with multi-Processor buildds, as it only
     # considers competition from the same processor.
     def jobs_compete_for_builders(a, b):
diff --git a/lib/lp/buildmaster/tests/test_builder.py b/lib/lp/buildmaster/tests/test_builder.py
index f122c43..333ca03 100644
--- a/lib/lp/buildmaster/tests/test_builder.py
+++ b/lib/lp/buildmaster/tests/test_builder.py
@@ -417,7 +417,6 @@ class TestFindBuildCandidatesGeneralCases(TestFindBuildCandidatesBase):
 
 
 class TestFindBuildCandidatesPPABase(TestFindBuildCandidatesBase):
-
     ppa_joe_private = False
     ppa_jim_private = False
 
@@ -531,7 +530,6 @@ class TestFindBuildCandidatesPPA(TestFindBuildCandidatesPPABase):
 
 
 class TestFindBuildCandidatesPrivatePPA(TestFindBuildCandidatesPPABase):
-
     ppa_joe_private = True
 
     def test_findBuildCandidate_for_private_ppa(self):
diff --git a/lib/lp/buildmaster/tests/test_buildfarmjob.py b/lib/lp/buildmaster/tests/test_buildfarmjob.py
index e0973fe..8b8739b 100644
--- a/lib/lp/buildmaster/tests/test_buildfarmjob.py
+++ b/lib/lp/buildmaster/tests/test_buildfarmjob.py
@@ -31,7 +31,6 @@ from lp.testing.layers import (
 
 
 class TestBuildFarmJobBase:
-
     layer = DatabaseFunctionalLayer  # type: Type[BaseLayer]
 
     def setUp(self, *args, **kwargs):
@@ -225,7 +224,6 @@ class TestBuildFarmJobMixin(TestCaseWithFactory):
 
 
 class TestBuildFarmJobSet(TestBuildFarmJobBase, TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/buildmaster/tests/test_buildfarmjobbehaviour.py b/lib/lp/buildmaster/tests/test_buildfarmjobbehaviour.py
index a164b11..11c6a3e 100644
--- a/lib/lp/buildmaster/tests/test_buildfarmjobbehaviour.py
+++ b/lib/lp/buildmaster/tests/test_buildfarmjobbehaviour.py
@@ -173,7 +173,6 @@ class TestBuildFarmJobBehaviourBase(TestCaseWithFactory):
 
 
 class TestDispatchBuildToWorker(StatsMixin, TestCase):
-
     layer = ZopelessLayer
     run_tests_with = AsynchronousDeferredRunTest
 
diff --git a/lib/lp/buildmaster/tests/test_interactor.py b/lib/lp/buildmaster/tests/test_interactor.py
index dc45dcc..d209b41 100644
--- a/lib/lp/buildmaster/tests/test_interactor.py
+++ b/lib/lp/buildmaster/tests/test_interactor.py
@@ -106,7 +106,6 @@ class MockBuilderFactory(BaseBuilderFactory):
 
 
 class TestBuilderInteractor(TestCase):
-
     run_tests_with = AsynchronousDeferredRunTest.make_factory(timeout=30)
 
     def setUp(self):
@@ -172,7 +171,6 @@ class TestBuilderInteractor(TestCase):
 
 
 class TestBuilderInteractorCleanWorker(TestCase):
-
     run_tests_with = AsynchronousDeferredRunTest
 
     @defer.inlineCallbacks
diff --git a/lib/lp/buildmaster/tests/test_manager.py b/lib/lp/buildmaster/tests/test_manager.py
index a0edb84..b87e95c 100644
--- a/lib/lp/buildmaster/tests/test_manager.py
+++ b/lib/lp/buildmaster/tests/test_manager.py
@@ -697,7 +697,6 @@ class TestWorkerScannerScan(StatsMixin, TestCaseWithFactory):
 
 
 class TestWorkerScannerWithLibrarian(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
     run_tests_with = AsynchronousDeferredRunTest.make_factory(timeout=20)
 
@@ -827,7 +826,6 @@ class TestWorkerScannerWithLibrarian(TestCaseWithFactory):
 
 
 class TestPrefetchedBuilderFactory(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_get(self):
@@ -1021,7 +1019,6 @@ class FakeBuilddManager:
 
 
 class TestWorkerScannerWithoutDB(TestCase):
-
     layer = ZopelessDatabaseLayer
     run_tests_with = AsynchronousDeferredRunTest
 
@@ -1320,7 +1317,6 @@ class TestCancellationChecking(TestCaseWithFactory):
 
 
 class TestBuilddManager(TestCase):
-
     layer = LaunchpadZopelessLayer
 
     def _stub_out_scheduleNextScanCycle(self):
@@ -1386,7 +1382,6 @@ class TestBuilddManager(TestCase):
 
 
 class TestFailureAssessmentsAndStatsdMetrics(StatsMixin, TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -1850,7 +1845,6 @@ def is_file_growing(filepath, poll_interval=1, poll_repeat=10):
 
 
 class TestBuilddManagerScript(TestCaseWithFactory):
-
     layer = LaunchpadScriptLayer
 
     def testBuilddManagerRuns(self):
diff --git a/lib/lp/buildmaster/tests/test_vocabularies.py b/lib/lp/buildmaster/tests/test_vocabularies.py
index f644a43..f7de6a4 100644
--- a/lib/lp/buildmaster/tests/test_vocabularies.py
+++ b/lib/lp/buildmaster/tests/test_vocabularies.py
@@ -9,7 +9,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestBuilderResourceVocabulary(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_provides_interface(self):
diff --git a/lib/lp/buildmaster/vocabularies.py b/lib/lp/buildmaster/vocabularies.py
index 154e445..d6a439c 100644
--- a/lib/lp/buildmaster/vocabularies.py
+++ b/lib/lp/buildmaster/vocabularies.py
@@ -22,7 +22,6 @@ from lp.services.webapp.vocabulary import NamedSQLObjectVocabulary
 
 
 class ProcessorVocabulary(NamedSQLObjectVocabulary):
-
     displayname = "Select a processor"
     _table = Processor
     _orderBy = "name"
diff --git a/lib/lp/charms/adapters/tests/test_buildarch.py b/lib/lp/charms/adapters/tests/test_buildarch.py
index c7659ba..a87528d 100644
--- a/lib/lp/charms/adapters/tests/test_buildarch.py
+++ b/lib/lp/charms/adapters/tests/test_buildarch.py
@@ -29,7 +29,6 @@ from lp.testing.layers import LaunchpadZopelessLayer
 
 
 class TestCharmBaseConfiguration(WithScenarios, TestCase):
-
     scenarios = [
         (
             "expanded",
@@ -118,7 +117,6 @@ class TestCharmBaseConfiguration(WithScenarios, TestCase):
 
 
 class TestDetermineInstancesToBuild(WithScenarios, TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     # Scenarios taken from the charmcraft build providers specification:
diff --git a/lib/lp/charms/browser/charmrecipe.py b/lib/lp/charms/browser/charmrecipe.py
index aafa195..5183ce8 100644
--- a/lib/lp/charms/browser/charmrecipe.py
+++ b/lib/lp/charms/browser/charmrecipe.py
@@ -233,6 +233,7 @@ def builds_and_requests_for_recipe(recipe):
     Builds that the user does not have permission to see are excluded (by
     the model code).
     """
+
     # We need to interleave items of different types, so SQL can't do all
     # the sorting for us.
     def make_sort_key(*date_attrs):
@@ -425,7 +426,6 @@ class CharmRecipeAddView(CharmRecipeAuthorizeMixin, LaunchpadFormView):
 class BaseCharmRecipeEditView(
     CharmRecipeAuthorizeMixin, LaunchpadEditFormView
 ):
-
     schema = ICharmRecipeEditSchema
     next_url = None
 
diff --git a/lib/lp/charms/browser/charmrecipelisting.py b/lib/lp/charms/browser/charmrecipelisting.py
index 4a47a81..384617b 100644
--- a/lib/lp/charms/browser/charmrecipelisting.py
+++ b/lib/lp/charms/browser/charmrecipelisting.py
@@ -22,7 +22,6 @@ from lp.services.webapp.batching import BatchNavigator
 
 
 class CharmRecipeListingView(LaunchpadView, FeedsMixin):
-
     feed_types = ()
 
     source_enabled = True
@@ -54,7 +53,6 @@ class CharmRecipeListingView(LaunchpadView, FeedsMixin):
 
 
 class GitCharmRecipeListingView(CharmRecipeListingView):
-
     source_enabled = False
 
     @property
@@ -65,7 +63,6 @@ class GitCharmRecipeListingView(CharmRecipeListingView):
 
 
 class PersonCharmRecipeListingView(CharmRecipeListingView):
-
     owner_enabled = False
 
 
diff --git a/lib/lp/charms/browser/tests/test_charmrecipe.py b/lib/lp/charms/browser/tests/test_charmrecipe.py
index 78bb21a..60c561e 100644
--- a/lib/lp/charms/browser/tests/test_charmrecipe.py
+++ b/lib/lp/charms/browser/tests/test_charmrecipe.py
@@ -76,7 +76,6 @@ from lp.testing.views import create_initialized_view, create_view
 
 
 class TestCharmRecipeNavigation(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -104,7 +103,6 @@ class TestCharmRecipeNavigation(TestCaseWithFactory):
 
 
 class BaseTestCharmRecipeView(BrowserTestCase):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/charms/browser/tests/test_charmrecipebuild.py b/lib/lp/charms/browser/tests/test_charmrecipebuild.py
index 83df915..a105e5d 100644
--- a/lib/lp/charms/browser/tests/test_charmrecipebuild.py
+++ b/lib/lp/charms/browser/tests/test_charmrecipebuild.py
@@ -41,7 +41,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestCanonicalUrlForCharmRecipeBuild(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -67,7 +66,6 @@ class TestCanonicalUrlForCharmRecipeBuild(TestCaseWithFactory):
 
 
 class TestCharmRecipeBuildView(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -198,7 +196,6 @@ class TestCharmRecipeBuildView(TestCaseWithFactory):
 
 
 class TestCharmRecipeBuildOperations(BrowserTestCase):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/charms/browser/tests/test_charmrecipelisting.py b/lib/lp/charms/browser/tests/test_charmrecipelisting.py
index 50e8b0a..a9baeea 100644
--- a/lib/lp/charms/browser/tests/test_charmrecipelisting.py
+++ b/lib/lp/charms/browser/tests/test_charmrecipelisting.py
@@ -28,7 +28,6 @@ from lp.testing.views import create_initialized_view
 
 
 class TestCharmRecipeListing(BrowserTestCase):
-
     layer = LaunchpadFunctionalLayer
 
     def assertCharmRecipesLink(
diff --git a/lib/lp/charms/browser/tests/test_hascharmrecipes.py b/lib/lp/charms/browser/tests/test_hascharmrecipes.py
index 19adca7..8925eb1 100644
--- a/lib/lp/charms/browser/tests/test_hascharmrecipes.py
+++ b/lib/lp/charms/browser/tests/test_hascharmrecipes.py
@@ -26,7 +26,6 @@ def make_git_ref(test_case):
 
 
 class TestHasCharmRecipesView(WithScenarios, TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     scenarios = [
@@ -89,7 +88,6 @@ class TestHasCharmRecipesView(WithScenarios, TestCaseWithFactory):
 
 
 class TestHasCharmRecipesMenu(WithScenarios, TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     scenarios = [
diff --git a/lib/lp/charms/mail/charmrecipebuild.py b/lib/lp/charms/mail/charmrecipebuild.py
index 172d9af..25dd581 100644
--- a/lib/lp/charms/mail/charmrecipebuild.py
+++ b/lib/lp/charms/mail/charmrecipebuild.py
@@ -12,7 +12,6 @@ from lp.services.webapp import canonical_url
 
 
 class CharmRecipeBuildMailer(BaseMailer):
-
     app = "charms"
 
     @classmethod
diff --git a/lib/lp/charms/tests/test_charmbase.py b/lib/lp/charms/tests/test_charmbase.py
index c49bdce..d392e33 100644
--- a/lib/lp/charms/tests/test_charmbase.py
+++ b/lib/lp/charms/tests/test_charmbase.py
@@ -26,7 +26,6 @@ from lp.testing.pages import webservice_for_person
 
 
 class TestCharmBase(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_implements_interface(self):
@@ -54,7 +53,6 @@ class TestCharmBase(TestCaseWithFactory):
 
 
 class TestCharmBaseProcessors(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -108,7 +106,6 @@ class TestCharmBaseProcessors(TestCaseWithFactory):
 
 
 class TestCharmBaseSet(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def test_getByDistroSeries(self):
@@ -133,7 +130,6 @@ class TestCharmBaseSet(TestCaseWithFactory):
 
 
 class TestCharmBaseWebservice(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_new_unpriv(self):
diff --git a/lib/lp/charms/tests/test_charmhubclient.py b/lib/lp/charms/tests/test_charmhubclient.py
index b951718..c33a955 100644
--- a/lib/lp/charms/tests/test_charmhubclient.py
+++ b/lib/lp/charms/tests/test_charmhubclient.py
@@ -148,7 +148,6 @@ class RequestMatches(MatchesAll):
 
 
 class TestCharmhubClient(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
diff --git a/lib/lp/charms/tests/test_charmrecipe.py b/lib/lp/charms/tests/test_charmrecipe.py
index 0f3502b..f646124 100644
--- a/lib/lp/charms/tests/test_charmrecipe.py
+++ b/lib/lp/charms/tests/test_charmrecipe.py
@@ -119,7 +119,6 @@ from lp.testing.pages import webservice_for_person
 
 
 class TestCharmRecipeFeatureFlags(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def test_feature_flag_disabled(self):
@@ -140,7 +139,6 @@ class TestCharmRecipeFeatureFlags(TestCaseWithFactory):
 
 
 class TestCharmRecipe(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -1020,7 +1018,6 @@ class TestCharmRecipe(TestCaseWithFactory):
 
 
 class TestCharmRecipeAuthorization(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -1215,7 +1212,6 @@ class TestCharmRecipeAuthorization(TestCaseWithFactory):
 
 
 class TestCharmRecipeDeleteWithBuilds(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
@@ -1333,7 +1329,6 @@ class TestCharmRecipeDeleteWithBuilds(TestCaseWithFactory):
 
 
 class TestCharmRecipeSet(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -1830,7 +1825,6 @@ class TestCharmRecipeSet(TestCaseWithFactory):
 
 
 class TestCharmRecipeWebservice(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/charms/tests/test_charmrecipebuild.py b/lib/lp/charms/tests/test_charmrecipebuild.py
index cde6235..e3816fe 100644
--- a/lib/lp/charms/tests/test_charmrecipebuild.py
+++ b/lib/lp/charms/tests/test_charmrecipebuild.py
@@ -78,7 +78,6 @@ expected_body = """\
 
 
 class TestCharmRecipeBuild(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
@@ -805,7 +804,6 @@ class TestCharmRecipeBuild(TestCaseWithFactory):
 
 
 class TestCharmRecipeBuildSet(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
@@ -868,7 +866,6 @@ class TestCharmRecipeBuildSet(TestCaseWithFactory):
 
 
 class TestCharmRecipeBuildWebservice(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/charms/tests/test_charmrecipebuildbehaviour.py b/lib/lp/charms/tests/test_charmrecipebuildbehaviour.py
index 2851a9f..07eb6e8 100644
--- a/lib/lp/charms/tests/test_charmrecipebuildbehaviour.py
+++ b/lib/lp/charms/tests/test_charmrecipebuildbehaviour.py
@@ -78,7 +78,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestCharmRecipeBuildBehaviourBase(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -160,7 +159,6 @@ class TestCharmRecipeBuildBehaviour(TestCharmRecipeBuildBehaviourBase):
 class TestAsyncCharmRecipeBuildBehaviour(
     StatsMixin, TestCharmRecipeBuildBehaviourBase
 ):
-
     run_tests_with = AsynchronousDeferredRunTestForBrokenTwisted.make_factory(
         timeout=30
     )
diff --git a/lib/lp/charms/tests/test_charmrecipebuildjob.py b/lib/lp/charms/tests/test_charmrecipebuildjob.py
index 0d671f0..87ee452 100644
--- a/lib/lp/charms/tests/test_charmrecipebuildjob.py
+++ b/lib/lp/charms/tests/test_charmrecipebuildjob.py
@@ -95,7 +95,6 @@ class FileUploaded(MatchesListwise):
 
 
 class TestCharmRecipeBuildJob(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def setUp(self):
@@ -114,7 +113,6 @@ class TestCharmRecipeBuildJob(TestCaseWithFactory):
 
 
 class TestCharmhubUploadJob(TestCaseWithFactory):
-
     layer = LaunchpadZopelessLayer
 
     def setUp(self):
diff --git a/lib/lp/charms/tests/test_charmrecipejob.py b/lib/lp/charms/tests/test_charmrecipejob.py
index 53e4bca..2b33d2e 100644
--- a/lib/lp/charms/tests/test_charmrecipejob.py
+++ b/lib/lp/charms/tests/test_charmrecipejob.py
@@ -46,7 +46,6 @@ from lp.testing.layers import ZopelessDatabaseLayer
 
 
 class TestCharmRecipeJob(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
@@ -63,7 +62,6 @@ class TestCharmRecipeJob(TestCaseWithFactory):
 
 
 class TestCharmRecipeRequestBuildsJob(TestCaseWithFactory):
-
     layer = ZopelessDatabaseLayer
 
     def setUp(self):
diff --git a/lib/lp/code/adapters/tests/test_branch.py b/lib/lp/code/adapters/tests/test_branch.py
index 4d83ca1..3bbd844 100644
--- a/lib/lp/code/adapters/tests/test_branch.py
+++ b/lib/lp/code/adapters/tests/test_branch.py
@@ -13,7 +13,6 @@ from lp.testing.layers import LaunchpadFunctionalLayer
 
 
 class TestBranchMergeProposalDelta(TestCase):
-
     layer = LaunchpadFunctionalLayer
 
     def setUp(self):
diff --git a/lib/lp/code/adapters/tests/test_branchcollection.py b/lib/lp/code/adapters/tests/test_branchcollection.py
index a2fdbaa..c547bcd 100644
--- a/lib/lp/code/adapters/tests/test_branchcollection.py
+++ b/lib/lp/code/adapters/tests/test_branchcollection.py
@@ -10,7 +10,6 @@ from lp.testing.layers import DatabaseFunctionalLayer
 
 
 class TestPersonProduct(TestCaseWithFactory):
-
     layer = DatabaseFunctionalLayer
 
     def test_person_product(self):
diff --git a/lib/lp/code/adapters/tests/test_gitrepository.py b/lib/lp/code/adapters/tests/test_gitrepository.py
index 94282d4..5fc0de1 100644
--- a/lib/lp/code/adapters/tests/test_gitrepository.py
+++ b/lib/lp/code/adapters/tests/test_gitrepository.py
@@ -11,7 +11,6 @@ from lp.testing.layers import LaunchpadFunctionalLayer
 
 
 class TestGitRepositoryDelta(TestCaseWithFactory):
-
     layer = LaunchpadFunctionalLayer
 
     def test_no_modification(self):
diff --git a/lib/lp/code/browser/bazaar.py b/lib/lp/code/browser/bazaar.py
index 9a65327..1a751fd 100644
--- a/lib/lp/code/browser/bazaar.py
+++ b/lib/lp/code/browser/bazaar.py
@@ -25,7 +25,6 @@ from lp.services.webapp.authorization import precache_permission_for_objects
 
 
 class BazaarApplicationView(LaunchpadView):
-
     page_title = "Launchpad Branches"
 
     @property
diff --git a/lib/lp/code/browser/branch.py b/lib/lp/code/browser/branch.py
index ae6115a..467a1bc 100644
--- a/lib/lp/code/browser/branch.py
+++ b/lib/lp/code/browser/branch.py
@@ -139,7 +139,6 @@ class BranchBreadcrumb(NameBreadcrumb):
 
 
 class BranchNavigation(WebhookTargetNavigationMixin, Navigation):
-
     usedfor = IBranch
 
     @stepthrough("+bug")
@@ -392,7 +391,6 @@ class BranchView(
     HasSnapsViewMixin,
     CodeImportTargetMixin,
 ):
-
     feed_types = (BranchFeedLink,)
 
     @property
@@ -642,7 +640,6 @@ class BranchView(
 
 
 class BranchRescanView(LaunchpadEditFormView):
-
     schema = Interface
     field_names = []
     next_url = None
@@ -1425,7 +1422,6 @@ class RegisterBranchMergeProposalView(LaunchpadFormView):
 
 @implementer(IBrowserPublisher)
 class BranchDiffView(DataDownloadView):
-
     content_type = "text/x-patch"
 
     def __init__(self, context, request, new, old=None):
diff --git a/lib/lp/code/browser/branchlisting.py b/lib/lp/code/browser/branchlisting.py
index a6a8581..f4b5533 100644
--- a/lib/lp/code/browser/branchlisting.py
+++ b/lib/lp/code/browser/branchlisting.py
@@ -814,7 +814,6 @@ class RecentlyChangedBranchesView(NoContextBranchListingView):
 
 
 class PersonBranchesMenu(ApplicationMenu):
-
     usedfor = IPerson
     facet = "branches"
     links = ["branches", "active_reviews", "source_package_recipes", "snaps"]
@@ -847,7 +846,6 @@ class PersonBranchesMenu(ApplicationMenu):
 
 
 class PersonProductBranchesMenu(PersonBranchesMenu):
-
     usedfor = IPersonProduct
     links = ["branches", "active_reviews", "source_package_recipes", "snaps"]
 
@@ -1025,7 +1023,6 @@ class PersonProductCodeSummaryView(PersonCodeSummaryView):
 
 
 class ProductBranchesMenu(ApplicationMenu):
-
     usedfor = IProduct
     facet = "branches"
     links = [
diff --git a/lib/lp/code/browser/branchmergeproposal.py b/lib/lp/code/browser/branchmergeproposal.py
index 6631a94..1e6bda0 100644
--- a/lib/lp/code/browser/branchmergeproposal.py
+++ b/lib/lp/code/browser/branchmergeproposal.py
@@ -1038,7 +1038,6 @@ class BranchMergeProposalVoteView(LaunchpadView):
 
 
 class BranchMergeProposalScheduleUpdateDiffView(LaunchpadEditFormView):
-
     schema = Interface
     field_names = []
     next_url = None
@@ -1130,7 +1129,6 @@ class MergeProposalEditView(
 
 
 class ResubmitSchema(IBranchMergeProposal):
-
     break_link = Bool(
         title="Start afresh",
         description=(
@@ -1423,7 +1421,6 @@ class BranchMergeProposalSubscribersView(LaunchpadView):
 class BranchMergeProposalChangeStatusView(
     MergeProposalEditView, BranchMergeProposalStatusMixin
 ):
-
     page_title = label = "Change merge proposal status"
     schema = IBranchMergeProposal
     field_names = []
diff --git a/lib/lp/code/browser/branchref.py b/lib/lp/code/browser/branchref.py
index 5d440ca..8723f98 100644
--- a/lib/lp/code/browser/branchref.py
+++ b/lib/lp/code/browser/branchref.py
@@ -30,7 +30,6 @@ class BranchRef:
 
 
 class BranchRefNavigation(Navigation):
-
     usedfor = IBranchRef
 
     @stepto("branch-format")
diff --git a/lib/lp/code/browser/branchsubscription.py b/lib/lp/code/browser/branchsubscription.py
index 2881b03..46b53a5 100644
--- a/lib/lp/code/browser/branchsubscription.py
+++ b/lib/lp/code/browser/branchsubscription.py
@@ -113,7 +113,6 @@ class _BranchSubscriptionView(LaunchpadFormView):
 
 
 class BranchSubscriptionAddView(_BranchSubscriptionView):
-
     page_title = label = "Subscribe to branch"
 
     @action("Subscribe")
diff --git a/lib/lp/code/browser/diff.py b/lib/lp/code/browser/diff.py
index 0e4fd79..cdb7996 100644
--- a/lib/lp/code/browser/diff.py
+++ b/lib/lp/code/browser/diff.py
@@ -19,7 +19,6 @@ from lp.services.webapp.publisher import canonical_url
 
 
 class PreviewDiffNavigation(Navigation, FileNavigationMixin):
-
     usedfor = IPreviewDiff
 
 
diff --git a/lib/lp/code/browser/gitlisting.py b/lib/lp/code/browser/gitlisting.py
index f5415f1..2be0c24 100644
--- a/lib/lp/code/browser/gitlisting.py
+++ b/lib/lp/code/browser/gitlisting.py
@@ -110,7 +110,6 @@ class BaseGitListingView(LaunchpadView):
 
 
 class TargetGitListingView(BaseGitListingView):
-