Thanks Nick Stefan for the report and Tim for the review.

Fixed #27186 -- Fixed model form default fallback for MultiWidget, FileInput, SplitDateTimeWidget, SelectDateWidget, and SplitArrayWidget.

Thanks Matt Westcott for the review.

Thanks Tim Graham for the review.

This was fixed when dynamic classes for deferred instance loading
was removed in 7f51876f.

Python 3.6 parses strings like '0_1' as numeric literals.
http://bugs.python.org/issue26331

Thanks strycore for the report and timgraham for suggesting the
solution.

Azerbaijani switched to Latin letters after Soviets and doesn't add il when
writing date time formats.

Reflects behavior changes in PEP 495 (Local Time Disambiguation).

http://bugs.python.org/issue27364

Less special-casing and code more in line with 'normal' index creation.

On PostGIS < 2, geometry_columns is a table that was manually maintained.
It's a view on PostGIS 2.

Removed possible u'' prefixes on Python 2.

http://bugs.python.org/issue28082

http://bugs.python.org/issue15767

Fixed #27211 -- Made UpdateCacheMiddleware include caching headers for "304 Not Modified" responses.