Generate fewer default posts in wp_list_authors() tests.

Saves about 7 seconds when running the suite.

See #30017.
Built from https://develop.svn.wordpress.org/trunk@29992


git-svn-id: http://core.svn.wordpress.org/trunk@29734 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: update to 4.1.6+. Adds support for cache-busting when auto-loading JS and CSS. Change the tests to run in /build. Changelog: https://github.com/tinymce/tinymce/blob/master/changelog.txt.
Fixes #30079
Built from https://develop.svn.wordpress.org/trunk@29994


git-svn-id: http://core.svn.wordpress.org/trunk@29735 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Fix typo in a CSS comment.

props iamtakashi.
fixes #30081.
Built from https://develop.svn.wordpress.org/trunk@29995


git-svn-id: http://core.svn.wordpress.org/trunk@29736 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Isolate :not selectors from CSS2 selectors.

props peterwilsoncc, iamtakashi.
fixes #30014.
Built from https://develop.svn.wordpress.org/trunk@29996


git-svn-id: http://core.svn.wordpress.org/trunk@29737 1a063a9b-81f0-0310-95a4-ce76da25c4cd