css/css-tables/iframe-display-table-content-insertion-ref.html - external/github.com/web-platform-tests/wpt - Git at Google

 <!doctype html>
 <div><span>This text should be before the iframe</span><iframe
   id=f style="display: table-column-group"></iframe></div>
	<!doctype html>
	<div><span>This text should be before the iframe</span><iframe
	id=f style="display: table-column-group"></iframe></div>