edit.
$wikiPage: the WikiPage edited
$rev: the new revision
-$baseID: the revision ID this was based off, if any
+$originalRevId: if the edit restores or repeats an earlier revision (such as a
+ rollback or a null revision), the ID of that earlier revision. False otherwise.
+ (Used to be called $baseID.)
$user: the editing user
&$tags: tags to apply to the edit and recent change
$revision: New Revision of the article (can be null for edits that change
nothing)
$status: Status object about to be returned by doEditContent()
-$baseRevId: the rev ID (or false) this edit was based on
+$originalRevId: if the edit restores or repeats an earlier revision (such as a
+ rollback or a null revision), the ID of that earlier revision. False otherwise.
+ (Used to be called $baseRevId.)
$undidRevId: the rev ID (or 0) this edit undid
'PageHistoryBeforeList': When a history page list is about to be constructed.