Fixed #23343 -- Typo in docs/ref/class-based-views/generic-date-based.txt.
Fixed #23342 -- Clarified warning about naive time objects.

Thanks to apollo13 for suggested wording.
Fixed #23324 -- Mentioned Site.id in contrib.sites docs.
Fixed #23327 -- Added 'zero' syntax to migrate help message
Fixed #23167 -- Added BaseForm.__repr__()

Thanks Keryn Knight for the idea.
Tweaked docstrings from previous commit.
Fixed #23333 -- Made urlsafe_base64_decode() return proper type on Python 3.
Fixed #23341 -- Better stacktrace error for makemigrations

Show the migration display name when references
nonexistent migration(s)