private void parseETag() throws Exception {
        require(currentElement);
        skipWhitespace();
        require('>');
        handler.endElement(currentElement);
        // not re-reporting any SAXException re bogus end tags,
        // even though that diagnostic might be clearer ...
    }
Parse an end tag.

<pre>
  [42] ETag ::= '&lt;/' Name S? '&gt;'
</pre>

<p>
NOTE: parseContent () chains to here, we already read the "&lt;/".
src/nu/validator/gnu/xml/aelfred2/XmlParser.java