<!-- for sanity's sake, we limit this wacked quirk to legacy full-document parsing, not to

innerHTML. We have no data showing whether (or that) this is needed for innerHTML. If innerHTML

is used on an SVG or MathML node, it definitely doesn't make any sense (there's nothing to pop

to in the first place). Therefore, rather than trying to figure out in what convoluted

conditions we could actually do this quirk for innerHTML, we just don't do it at all. -->

<p>If the parser was created as part of the <span>HTML fragment parsing algorithm</span>, then

act as described in the "any other start tag" entry below. (<span>fragment case</span>)</p>

<p>Otherwise:</p>

<p>Pop an element from the <span>stack of open elements</span>, and then keep popping more

elements from the <span>stack of open elements</span> until the <span>current node</span> is a

<span>MathML text integration point</span>, an <span>HTML integration point</span>, or an

element in the <span>HTML namespace</span>.</p>

<p>Then, reprocess the token.</p>