Documentation/sphinx: Remove the repeated word "the" in comments.

    def handle_func_like_macro(self, sig, signode):

        u"""Handles signatures of function-like macros.

        If the objtype is 'function' and the the signature ``sig`` is a

        If the objtype is 'function' and the signature ``sig`` is a

        function-like macro, the name of the macro is returned. Otherwise

        ``False`` is returned.  """