correct a revision/tooltip mismatch.

props adamsilverstein. see #23497

git-svn-id: http://core.svn.wordpress.org/trunk@23831 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make sure that the ID of the right revision is not less than the ID of the left revision

see #23497

git-svn-id: http://core.svn.wordpress.org/trunk@23832 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.6-alpha-23833.

git-svn-id: http://core.svn.wordpress.org/trunk@23833 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Kill the HR on revisions page. see #23497

git-svn-id: http://core.svn.wordpress.org/trunk@23834 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: style native `mediaelement` video player with a black background color. Props obenland, closes #23821.

git-svn-id: http://core.svn.wordpress.org/trunk@23835 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Rename the_extra_content() to the_remaining_content().

fixes #23877.

git-svn-id: http://core.svn.wordpress.org/trunk@23836 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: better back compat handling by moving version compare before the include to avoid loading the file altogether. Also prevent Customizer views. Props obenland, closes #23819.

git-svn-id: http://core.svn.wordpress.org/trunk@23837 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: back compat file PHPDoc updates, thanks DrewAPicture for the nudge. See #23819.

git-svn-id: http://core.svn.wordpress.org/trunk@23838 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: improvements to Image post format handling to use a custom image size instead of filtering a `$content_width` variable.

Includes CSS cleanup and markup improvements to both video and image templates, moving the media HTML piece out of the `header` element.

Props obenland, closes #23620.

git-svn-id: http://core.svn.wordpress.org/trunk@23839 1a063a9b-81f0-0310-95a4-ce76da25c4cd