Thread:Extension talk:Scribunto/Module page not formatted

I just upgraded to MediaWiki 1.23 from 1.22 and was really surprised to find the Module namespace was no longer formatted at all. As in, action=view displays a giant block of text without any newlines or syntax highlighting. All of the extensions I used have been upgraded to the latest, and LocalSettings.php had CodeEditor and GeSHi added to the extension list. Setting $wgCodeEditorEnableCore, $wgScribuntoUseGeSHi, and $wgScribuntoUseCodeEditor all to true doesn't seem to do anything. What am I doing wrong?