MediaWiki:Gadget-WatchlistChangesBold.js

$j(document).ready( function() {
 var $message = $('#mw-wlheader-showupdated');
 if( $message.length == 1 ) {
  $message.html('Pages that have been changed since you last visited them are shown in <b>bold</b>.');
  $message.show(0); /* counters hiding in enhanced RC mode */
 }
});