Inline documentation for hooks in wp-includes/shortcodes.php.

props natejacobs.
see #25229.

git-svn-id: https://develop.svn.wordpress.org/trunk@25423 602fd350-edb4-49c9-b593-d223f7449a82
Inline documentation for hooks in wp-admin/ms-delete-site.php.

props NikV.
see #25229.

git-svn-id: https://develop.svn.wordpress.org/trunk@25424 602fd350-edb4-49c9-b593-d223f7449a82