<p id="hello">This will not.</p>
<p id="test" t:id="test">This will also be replaced, but the id will stay.</p>
<t:tagname id="moretest">This will say "foo", not "bar".</t:tagname>
+ <p t:id="test">Two elements can have the same ID, so this should be replaced again.</p>
</body>
</html>