Use a docs-specific variable for the `link_category` hook docs in wp-admin/bookmarks-template.php.

See #25364.

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Hook docs spacing and standards fixes for wp-admin/includes/ajax-actions.php.

See #25374.

Built from https://develop.svn.wordpress.org/trunk@26981


git-svn-id: http://core.svn.wordpress.org/trunk@26858 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: fix 3.x callbacks added with init.setup as they run before the compat3x plugin is loaded. Ideally this will be fixed internally in TinyMCE, see #24067.
Built from https://develop.svn.wordpress.org/trunk@26982


git-svn-id: http://core.svn.wordpress.org/trunk@26859 1a063a9b-81f0-0310-95a4-ce76da25c4cd