link_open_tag = link_open_tag_match.group(1)
            assert isinstance(link_open_tag, str)

            attributes: list[HTMLLinkAttribute] = []
            for attr_name, attr_quote, attr_value in re.findall(
                HTML_ATTR_RE, link_open_tag
            ):
                assert isinstance(attr_name, str)
                assert isinstance(attr_quote, str)
                assert isinstance(attr_value, str)