Generalize the hook documentation for the `set-screen-option` filter.

The filter covers more than [items]_per_page screen options.

Fixes #26186.


git-svn-id: https://develop.svn.wordpress.org/trunk@27379 602fd350-edb4-49c9-b593-d223f7449a82
Let get_the_date() accept a post object.

props tanner-m, adamsilverstein, bigdawggi.
fixes #13771.


git-svn-id: https://develop.svn.wordpress.org/trunk@27380 602fd350-edb4-49c9-b593-d223f7449a82