-selfrender=1
<span boo="foo"><p>foo</p><p>bar</p></span>
<!--expected-->
<p><span boo="foo">foo</span></p>
<p><span boo="foo">bar</span></p>
-selfrender=1
<span boo="foo"><p>foo</p><p>bar</p></span>
<!--expected-->
<p><span boo="foo">foo</span></p>
<p><span boo="foo">bar</span></p>