The Document field in a doc-base file should not end in whitespace. doc-base (at least as of 0.8.5) cannot cope with such fields and debhelper 5.0.57 or earlier may create files ending in whitespace when installing such files.
The tag is present in Lintian version
That is the most recent version we know about.
We use semantic versions.
The patch number is a commit step indicator relative to the
release tag in our Git
You can find the detection logic for this version at commit ffc17eb. For merge requests, please use the latest version in the Lintian check menus.