src/third_party/web_platform_tests/conformance-checkers/html/microdata/itemid/userinfo-username-contains-at-sign-novalid.html - cobalt - Git at Google

 <!DOCTYPE html>
 <meta charset=utf-8>
 <title>invalid itemid: userinfo-username-contains-at-sign</title>
 <div itemid="http://::@c@d:2" itemtype="http://foo" itemscope></div>
	<!DOCTYPE html>
	<meta charset=utf-8>
	<title>invalid itemid: userinfo-username-contains-at-sign</title>
	<div itemid="http://::@c@d:2" itemtype="http://foo" itemscope></div>