Removed instructions about download_url from release process notes.

This is no longer something that has to happen now that 5c771da3 is in.
Fixed a line that was overindented.
Removed a trailing space in the template name on line 174.
This trailing space may seem innocuous, but can be easily copied-and-pasted from the docs.
This can lead to bizarre File Not Found errors where the checked paths look correct, but actually aren't because
the trailing space is hard to see in an error message.
Merge pull request #993 from almostabc/template-include-docs-update

Removed a trailing space in the template builtins docs.
Removed LocaleMiddleware from settings template.

It was added in 3f1c7b70537330435e2ec2fca9550f7b7fa4372e.

Single language sites should always be translated in LANGUAGE_CODE,
regardless of the browser's Accept-Language. Having LocaleMiddleware
enabled can result in having some parts, like the admin, translated
in an unexpected language, typically if someone browses a non-English
website on a system set up in English. Since most websites won't be
translated in multiple languages — especially at the time they're
created — it's better not to enable LocaleMiddleware by default.

Thanks Ramiro for the feedback.
Added release note about percent literals in cursor.execute

Thanks Aymeric Augustin for noticing the omission and Tim Graham
for the text review.
Fixes #9055 (again).
Fixed #20114 -- support custom project login_url in tests

Thanks to Matias Bordese for the patch
Fixed #20207 -- Handle ManyToManyField with a unicode name correctly.
Explicitly removes dismissClock

Uses the removeEvent function in core.js to remove the function from
the document click event.
Refs #4045.
Explicitly removes dismissCalendar

Uses the removeEvent function in core.js to remove the dismissCalendar
function from the document click event.
Fixes #4045.
Fix #15126: Better error message when passing invalid options to ModelForm.Meta.
Merge pull request #1000 from bmispelon/ticket-15126

Fix #15126: Better error message when passing invalid options to ModelFo...
Fix #20111 Added more precise message level for succcess and warning messages
Merge pull request #938 from darklow/ticket_20111

Added more precise message level for succcess and warning messages
Removed references to the DDN triage state.

Rephrased "How can I help with triaging?" a bit to reflect the current
practice.
Fixed #14019 -- Initialize `SQLInsertCompiler.return_id` attribute.
Fix admin_views tests after commit 3be368c73e.
Merge pull request #1003 from bmispelon/fix-tests-3be368c73e

Fix admin_views tests after commit 3be368c73e.
Added some further guidance to "accepted" triage stage

Now that DDN is gone, I felt it was worth some extra language
about what "accepted" means, and qualify what it means to be "safe"
to start writing a patch.
Made usage of assertTemplateUsed in admin_views tests

Thanks Baptiste Mispelon for the suggestion.