The new handling allows us to do away with the whitelisting that was
required to support date and datetime objects.

Thanks Markus Holtermann for the report.

Thanks kz26 for the report and the suggested fix. Refs #19758.

Thanks bjb at credil.org for the report.

Thanks Gavin McQuillan for the report.

Fixed #21268 -- Fixed E303 pep8 warnings

This changed was reverted in 5d74853e.

Unnecessary since introduction of DiscoveryTestRunner in 9012833a.

Thanks wildfire for the report.

Thanks Raphaël Barrois for the report and the initial patch and
Aymeric Augustin for the review.

This commit also lays the groundwork for future tests for the
makemigrations command.

The method didn't change standard __deepcopy__ in any way.

Thanks Aymeric Augustin for the suggestion.

Fixed #21270 -- Fixed E701 pep8 warnings

Thanks Manel Clos for the report and the initial patch, and
Marc Tamlyn and Tim Graham for the review.

refs #18866.

Thanks SamBull for the report.

Fixed #7261 -- support for __html__ for library interoperability

Fixed DeprecationWarning caused by assertEquals.

Refs #6730.

select_related('foo').select_related('bar') is now equivalent to
select_related('foo', 'bar').

Also reworded docs to recommend select_related(*fields) over select_related()