Just noticed while nulediting by a bot:
I doubt that removing closing HTML-tag and leaving unclosed <div>s in page namespace (this one is opened in the page header) is intended behaviour.
Or, maybe, we should rely that MediaWiki will close all open tags itself and we should not care?
Re-adding the removed </div> manually does not work unless some other content is also added. The NOEDITSECTION and <references/> from standard footer were intentionally removed as unneeded in this particular page.