$user = is_null( $user ) ? $wgUser : $user;
//XXX: check $user->getId() here???
+ // Use a sane default for $serialization_format, see bug 57026
+ if ( $serialization_format === null ) {
+ $serialization_format = $content->getContentHandler()->getDefaultFormat();
+ }
+
if ( $this->mPreparedEdit
&& $this->mPreparedEdit->newContent
&& $this->mPreparedEdit->newContent->equals( $content )