34c34,35
< 		subentries.className = 'mw-changeslist-expanded';
---
> 		subentries.className = subentries.className.replace(
>             /\bmw-changeslist-hidden\b/, 'mw-changeslist-expanded');
38c39,40
< 		subentries.className = 'mw-changeslist-hidden';
---
> 		subentries.className = subentries.className.replace(
>             /\bmw-changeslist-expanded\b/, 'mw-changeslist-hidden');
40c42
< }
---
> };