Make printable representation out of this instance.

def fmt(self):
        """Make printable representation out of this instance.
        """
        tmpl = string.Template(self.template)
        kw = {}
        for key, val in self.kw.items():
            if key == 'phrase':
                kw[key] = val
            else:
                kw[key] = val.fmt()
        return tmpl.substitute(kw)