Improve inline documenation for `get_the_time()` and `get_post_time().

Props ruud@joyo for the initial patch.
Fixes #26682.


git-svn-id: https://develop.svn.wordpress.org/trunk@27148 602fd350-edb4-49c9-b593-d223f7449a82
Improve inline documentation for `wp_new_user_notification()`.

Props antorome for the initial patch.
Fixes #26703.


git-svn-id: https://develop.svn.wordpress.org/trunk@27149 602fd350-edb4-49c9-b593-d223f7449a82