Better test method name in formatting/IsEmail.php.

Props dlh.
Fixes #30397.

git-svn-id: https://develop.svn.wordpress.org/trunk@30392 602fd350-edb4-49c9-b593-d223f7449a82
Accessibility: hide admin menu separators from screen readers.

props afercia. fixes #30010.


git-svn-id: https://develop.svn.wordpress.org/trunk@30393 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fifteen: doc cleanup, addresses removing periods from file header summaries, some spacing, loop documentation, and https instead of http.

Props DrewAPicture, MikeHansenMe, see #30149.



git-svn-id: https://develop.svn.wordpress.org/trunk@30394 602fd350-edb4-49c9-b593-d223f7449a82