Fixed ReST typo in topics/class-based-views/mixins.txt
Fixed #20774 -- Mention the new django-localflavor app as a replacement for the contrib app.
Allowed overriding variables in docs/Makefile.
Misc doc cleanups.
Fixed #18213 -- Allowed empty fixtures (emit a warning rather than raising an exception).
Fixed #20817 -- Added html_message parameter to django.core.mail.send_mail()
Deprecated django.utils.importlib

This was a shim for pre-Python 2.7 support.
Add utf-8 preamble to admin_scripts temp settings file

As some settings are copied from current user settings, we cannot
be sure the characters are pure ascii.
Fixed #14850 -- Cleaned up duplicate code in admin formset handling.

Thanks apollo13 for the report and review.
Removed most of absolute_import imports

Should be unneeded with Python 2.7 and up.
Added some unicode_literals along the way.
Fixed #20823 -- Typo in docs/ref/forms/validation.txt
Fixed #20785 -- Corrected exception caught for Oracle LIKE operator detection

The code that tests to see which LIKE expressions to use now runs
using non-error-wrapped cursor, so cx_Oracle exceptions need to be caught
rather than Django DatabaseErrors.

Thanks Trac user ludo for report and initial patch.
Fixed #19082 -- Enabled admin field pre-population for existing objects.
Thanks to msaelices and d1ffuz0r for the initial patch and tests.
Updated some minified admin javascript files.
Doc tweaks for html_message parameter to send_mail(); refs #20817
Fixed #19877 -- Added `--no-color` option to `BaseCommand` to avoid using output styles.
Fixed a test that could fail depending on PASSWORD_HASHERS.

Thanks Claude. Refs #20760.
Fixed a test that depended on the DB backend; refs #19877. Thanks Loic.
Removed part of a test that doesn't work on Jenkins; refs #19877.
Updated flatpages tests to override CSRF_FAILURE_VIEW.