Merge ~cjwatson/launchpad:fakepackager-dpkg-1.19.3 into launchpad:master

[Colin Watson]

Adjust fakepackager.rst for dpkg-dev >= 1.19.3

The changelog for dpkg 1.19.3 says:

  * dpkg-genchanges: Only reference binary packages being uploaded, which
    means that for a source-only upload, the Binary and Description fields
    should be empty. Closes: #818618

We don't really care about this detail in `fakepackager.rst`, so adjust the expected output to compensate for it.

[Jürgen Gmach (jugmac00)]

review: Approve

diff --git a/lib/lp/soyuz/doc/fakepackager.rst b/lib/lp/soyuz/doc/fakepackager.rst
index 99be2c7..12ba3ff 100644
--- a/lib/lp/soyuz/doc/fakepackager.rst
+++ b/lib/lp/soyuz/doc/fakepackager.rst
@@ -98,16 +98,13 @@ Now we can build the source package using the generated tarball.
     ...     print(changesfile.read())
     Format: ...
     Date: ...
-    Source: biscuit
-    Binary: biscuit
+    Source: biscuit...
     Architecture: source
     Version: 1.0-1
     Distribution: hoary
     Urgency: low
     Maintainer: Launchpad team <[e-mail]>
-    Changed-By: Foo Bar <[e-mail]>
-    Description:
-     biscuit    - Stuff for testing
+    Changed-By: Foo Bar <[e-mail]>...
     Changes:
      biscuit (1.0-1) hoary; urgency=low
      .