Change Details

* Our existing Echo hook only fires for edits, RevisionDataUpdates fires also for changes to transclusions. * Right now CommentParser is run twice, once to generate notifications and again to deal with permalinks; this could potentially allow us to only parse once. * This would fix issues with notifications not being fired if we implemented per-page new topic notifications (T263821), and the change that added a topic only happened on a transcluded page