My users requested including the comment after the title, just like the editor. Because I'm afraid of using new variable names I kept the same structure as the ShowUser block, but someone who understands scope could easily make this another global variable and also pass a maximum string length.
#global $wgSimpleChangesShowUser;
#if ( $wgSimpleChangesShowUser ) {
# from ChangesList::insertUserRelatedLinks()
$user = ' <i>' . substr($rc->mAttribs['rc_comment'] ,0,60). ' </i>';
$changeLine .= Html::rawElement( 'span', array( 'class' => 'simplechanges-comment' ), $user );
#}
The result looks like this:
- Main Page (Dcianf) Changed Recent Changes to 90 days