id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
12055	HTML5 support	Matti Järvinen		"With HTML source:
{{{
<article>
    <h1>Hi</h1>
    <p>Lipsum</p>
</article>
}}}

Current nightly produces:
{{{
<h1>Hi</h1>

<p>Lipsum</p>
}}}

Steps to reproduce:
1. Change to source view
2. Paste above HTML snippet
3. Change back to WYSIWYG
4. No more article tags

In #4556 [6988] initial HTML5 support was added. Did this work at all in any point or was it broken with ACF? core/dtd.js lists most of HTML5 elements including article."	Bug	closed	Normal		Core : DTD		invalid