def _do_comment(self, node):
if not _in_subset(self.subset, node): return<EOL>if self.comments:<EOL><INDENT>W = self.write<EOL>if self.documentOrder == _GreaterElement: W('<STR_LIT:\n>')<EOL>W('<STR_LIT>')<EOL>W(node.data)<EOL>W('<STR_LIT>')<EOL>if self.documentOrder == _LesserElement: W('<STR_LIT:\n>')<EOL><DEDENT>
_do_comment(self, node) -> None
        Process a comment node. Render a leading or trailing #xA if the
        document order of the comment is greater or lesser (respectively)
        than the document element.