Merge ~mertkirpici/juju-lint:lp/1903973 into juju-lint:master

[Mert Kirpici]

LP #1903973

fix: declare hw-health to be metal only

The canonical-rules ruleset was skipped during the first handling of this issue

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[🤖 prod-jenkaas-bootstack (prod-jenkaas-bootstack)]

FAILED: Continuous integration, rev:cdee5109d543eb08a84e33f90298880e3aa661b0
https://jenkins.canonical.com/bootstack/job/lp-juju-lint-ci/17/
Executed test runs:
    FAILURE: https://jenkins.canonical.com/bootstack/job/lp-charm-test-functest/1879/
    None: https://jenkins.canonical.com/bootstack/job/lp-update-mp/544/

Click here to trigger a rebuild:
https://jenkins.canonical.com/bootstack/job/lp-juju-lint-ci/17//rebuild

review: Needs Fixing (continuous-integration)

[Andrea Ieri (aieri)]

LGTM

review: Approve

[🤖 prod-jenkaas-bootstack (prod-jenkaas-bootstack)]

PASSED: Continuous integration, rev:781eb217164c44206ef48dbaab8a3a51e3400ca1
https://jenkins.canonical.com/bootstack/job/lp-juju-lint-ci/18/
Executed test runs:
    SUCCESS: https://jenkins.canonical.com/bootstack/job/lp-charm-test-functest/1881/
    None: https://jenkins.canonical.com/bootstack/job/lp-update-mp/546/

Click here to trigger a rebuild:
https://jenkins.canonical.com/bootstack/job/lp-juju-lint-ci/18//rebuild

review: Approve (continuous-integration)

[Robert Gildein (rgildein)]

LGTM

review: Approve

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision 10e3c65e4507e577dc88ca8c89855e750f919234

diff --git a/contrib/canonical-rules.yaml b/contrib/canonical-rules.yaml
index 05982c5..4190af6 100644
--- a/contrib/canonical-rules.yaml
+++ b/contrib/canonical-rules.yaml
@@ -96,7 +96,7 @@ subordinates:
  thruk-agent:
   where: on nagios
  hw-health:
-  where: host only
+  where: metal only
  logrotated:
   where: all
  local-users:
diff --git a/jujulint/lint.py b/jujulint/lint.py
index 5f764a9..8fa3f97 100755
--- a/jujulint/lint.py
+++ b/jujulint/lint.py
@@ -237,7 +237,7 @@ class Linter:
         If the input value does not match the expected format, it is returned
         without the change.
         """
-        if type(val) != str:
+        if not isinstance(val, str):
             return val
 
         try: