'Return a new nonterminal whose symbol is ``A/B``, where ``A`` is
the symbol for this nonterminal, and ``B`` is the symbol for rhs.
:param rhs: The nonterminal used to form the right hand side
of the new nonterminal.
:type rhs: Nonterminal
:rtype: Nonterminal'

def __div__(self, rhs):

    return Nonterminal((u'%s/%s' % (self._symbol, rhs._symbol)))
