r"""Build tag full info include the attributes.

        :param tag: tag name.
        :param text: tag text.
        :param attrs: tag attributes. Default：``None``.
        :type attrs: dict or None
        :rtype: str

def build_tag(self, tag, text='', attrs=None):
        r"""Build tag full info include the attributes.

        :param tag: tag name.
        :param text: tag text.
        :param attrs: tag attributes. Default：``None``.
        :type attrs: dict or None
        :rtype: str
        """
        return '%s%s%s' % (self.tag_start(tag, attrs), text, self.tag_end(tag))