def striptags(self):
        r"""Unescape markup into an unicode string and strip all tags.  This
        also resolves known HTML4 and XHTML entities.  Whitespace is
        normalized to one:

        >>> Markup("Main &raquo;  <em>About</em>").striptags()
        u'Main \xbb About'
        """
        stripped = u' '.join(_striptags_re.sub('', self).split())
        return Markup(stripped).unescape()