keep the same order of operations; add return statement

dom.bs

@@ -4572,6 +4572,10 @@ boolean <var>subtree</var>:
  <a>other applicable specifications</a> and pass <var>node</var>, <var>copy</var>, and
  <var>subtree</var> as parameters.
 
+ <li><p>If <var>subtree</var> is true, then for each <var>child</var> of <var>node</var>'s
+ <a for=tree>children</a>, in <a>tree order</a>: <a>clone a node and append</a> given
+ <var>child</var>, <var>copy</var>, <var>document</var>, and <var>subtree</var>.
+
  <li>
   <p>If <var>node</var> is an <a for=/>element</a>, <a for=Element>shadow host</a>, and its
   <a for=Element>shadow root</a>'s <a for=ShadowRoot>clonable</a> is true:
@@ -4594,9 +4598,7 @@ boolean <var>subtree</var>:
    <var>subtree</var>.
   </ol>
 
- <li><p>If <var>subtree</var> is true, then for each <var>child</var> of <var>node</var>'s
- <a for=tree>children</a>, in <a>tree order</a>: <a>clone a node and append</a> given
- <var>child</var>, <var>copy</var>, <var>document</var>, and <var>subtree</var>.
+ <li><p>Return <var>copy</var>.
 </ol>
 </div>