Thanks to av@rdf.ru and flarno11@yahoo.de for the report.

Allows a `GenericForeignKey` to reference proxy models. The default
for `for_concrete_model` is `True` to keep backwards compatibility.

Also added the analog `for_concrete_model` kwarg to
`generic_inlineformset_factory` to provide an API at the form level.

Only make assertions that actually test the functionality of the
change and not unrelated pieces.

Thanks uberj@ for the report and lolek09 for the patch.

Refs #20474.

Refs #20474.

Thanks Katya for the suggestion.

Thanks diek@ for the suggestion.

Thanks jacob for the suggestion and ryankask
for the patch.

Don't try to be smart about building a good-looking help string
because it evaluates translations too early, simply use the same old
strategy as before. Thanks Donald Stufft for the report.

Also, actually fix the case reported by the OP by special-casing
CheckboxSelectMultiple.

Added tests.

Refs #9321.

Fixed comments for translators example in the i18n documentation

The documentation regarding adding a comment for translators was confusing
as the example contained mismatching tags.

Fixed #11398 - Added a pre_syncdb signal

Fixed #20478 – Added support for HTTP PATCH method in generic views.

gettext 0.15 has been released in July 2006.

The regex method used until now for the strip_tags utility is fast,
but subject to flaws and security issues. Consensus and good
practice lead use to use a slower but safer method.

Thanks Ramiro Morales for the initial patch and
Preston Holmes for the review.

Thanks Jannis Leidel for the suggestion.

Thanks Donald Stufft for the suggestion and
Susan Tan and Brian Fabian Crain for the patch.

When an exception other than IntegrityError was raised, get_or_create
could fail and leave the database connection in an unusable state.

Thanks UloPe for the report.

Fixed #18709 -- Check if initial_value is a callable

The fix was already in the patch for #18702, so only test added for
ticket #19895.

Slightly reworded 'last()' docs

In _get_changed_data, check if initial_value is a callable and call it
if it is.

Used formatted date instead of datetime object for the end of the
year range, as the datetime object loses fractions-of-seconds when
inserted into the db.

Removed the explicit casting of strings to dates