+'PageContentSave': before an article is saved.
+$article: the WikiPage (object) being saved
+$user: the user (object) saving the article
+$content: the new article content, as a Content object
+$summary: the article summary (comment)
+$isminor: minor flag
+$iswatch: watch flag
+$section: section #
+
+'PageContentSaveComplete': After an article has been updated
+$article: WikiPage modified
+$user: User performing the modification
+$content: New content, as a Content object
+$summary: Edit summary/comment
+$isMinor: Whether or not the edit was marked as minor
+$isWatch: (No longer used)
+$section: (No longer used)
+$flags: Flags passed to WikiPage::doEditContent()
+$revision: New Revision of the article
+$status: Status object about to be returned by doEditContent()
+$baseRevId: the rev ID (or false) this edit was based on
+