Helper function to produce an HTML tag.

def tag(self, name, attrs=None, selfclosing=None):
        """Helper function to produce an HTML tag."""
        if self.disable_tags > 0:
            return

        if name in self.linkable_tags and attrs and len(attrs) > 0:
            for attrib in attrs:
                if attrib[0] in self.linkable_attrs:
                    attrib[1] = INTERNAL_LINK.sub('{\g<1>}', attrib[1])

        super().tag(name, attrs, selfclosing)