I know I keep harping on this, but now that Tech News has announced that Tidy will be going away in 2017, the "Pages using invalid self-closed HTML tags" categories really do need to be fully populated on all wikis. The category was added to MediaWiki in July 2016, and it has still not fully populated. For example, on te.wikisource.org, there is only one page, "మూస:Transform-rotate", in the error category at this writing, but that page doesn't even have a problem – the problem is in a page that is transcluded on that page. That transcluded page is not yet in the error category (after seven months). This is task T132467.
How can we get an accurate list of all pages that need to be fixed?
See also task T106685 (insource searches don't work right), which is another bug that makes it more difficult to migrate away from Tidy. Let me know how I can help.