Dump an HTML node, recursive behaviour,children are printed
           too.

def htmlNodeDumpFormatOutput(self, buf, cur, encoding, format):
        """Dump an HTML node, recursive behaviour,children are printed
           too. """
        if buf is None: buf__o = None
        else: buf__o = buf._o
        if cur is None: cur__o = None
        else: cur__o = cur._o
        libxml2mod.htmlNodeDumpFormatOutput(buf__o, self._o, cur__o, encoding, format)