Last modified: 2013-11-19 06:16:26 UTC
When a tag <ref> is inserted in visual editor it shows a wikitext warning to user but there are few more tags which I think will be good to be added to the wikitext detection regex such as <s> <math> <poem> None of them triggers wikitext warning right now.
WONTFIX. The test is not intended to catch every possible mistaken attempted insertion of HTML or wikitext.