LayoutTests/editing/pasteboard/5027857.html - WebKit - Git at Google

 <p>This tests a bug when copying HTML markup inside &lt;pre&gt; tags.  When pasted, this content would appear as the rendered form of that markup.  You should see markup in the editable region below.</p>
 <pre id="pre" contenteditable="true">&lt;input type='button'&gt;foo&lt;br&gt;bar&lt;b&gt;baz&lt;/b&gt;</pre>

 <script>
 var pre = document.getElementById("pre");
 pre.focus();
 document.execCommand("SelectAll");
 document.execCommand("Cut");
 document.execCommand("Paste");
 </script>
	<p>This tests a bug when copying HTML markup inside <pre> tags. When pasted, this content would appear as the rendered form of that markup. You should see markup in the editable region below.</p>
	<pre id="pre" contenteditable="true"><input type='button'>foo<br>bar<b>baz</b></pre>

	<script>
	var pre = document.getElementById("pre");
	pre.focus();
	document.execCommand("SelectAll");
	document.execCommand("Cut");
	document.execCommand("Paste");
	</script>