Moved test correction from 5b1fb0a75
Ignored deprecation warnings for CreationIndexesTests
Fixed typo in test_utils comment.
Fixed #20349 -- Moved setting_changed signal to django.core.signals.

This removes the need to load django.test when not testing.
Added a test to ensure bad assignation to M2M doesn't clear data

Refs #14394.
Complemented pickle test for ValuesQuerySet with related field

Refs #14515.
Fixed #22461 -- Added if-unmodified-since support to the condition decorator.
Fixed #10414 -- Made select_related() fail on invalid field names.
Fixed #24041 -- Documented effect of changing a model instance's primary key.
Fixed #24049 -- Removed obsolete Java notes for Mac OS.
Removed shutil.copystat copied from stdlib (added to support an old Python?).