Update dom.bs

Author: annevk

dom.bs

@@ -6859,18 +6859,19 @@ again by an <a lt="upgrade an element">upgrade</a>.
 <a for=Element>namespace prefix</a>, followed by "<code>:</code>", followed by its
 <a for=Element>local name</a>.
 
+<div algorithm>
 <p>An <a for=/>element</a>'s <dfn for=Element>HTML-uppercased qualified name</dfn> is the return
 value of these steps:
 
 <ol>
  <li><p>Let <var>qualifiedName</var> be <a>this</a>'s <a for=Element>qualified name</a>.
 
  <li><p>If <a>this</a> is in the <a>HTML namespace</a> and its <a for=Node>node document</a> is an
- <a>HTML document</a>, then set <var>qualifiedName</var> to <var>qualifiedName</var> in
- <a>ASCII uppercase</a>.
+ <a>HTML document</a>, then return <var>qualifiedName</var> in <a>ASCII uppercase</a>.
 
  <li>Return <var>qualifiedName</var>.
 </ol>
+</div>
 
 <p class=note>User agents could optimize <a for=Element>qualified name</a> and
 <a for=Element>HTML-uppercased qualified name</a> by storing them in internal slots.