* New undosucceeded explainundosucceeded undo-summary

Tip: Did you know that apart from so called "core messages", there are also extensions, which can be translated? You'll find them in SVN at http://svn.wikimedia.org/svnroot/mediawiki/trunk/extensions Those which can be localized will have a file ending "i18n.php". They contain strings for all languages. After you translate them, submit patches to bugzilla http://bugzilla.wikimedia.org/