Dump the macro definition for the def created by macro_body.

def macro_def(self, macro_ref, frame):
        """Dump the macro definition for the def created by macro_body."""
        arg_tuple = ', '.join(repr(x.name) for x in macro_ref.node.args)
        name = getattr(macro_ref.node, 'name', None)
        if len(macro_ref.node.args) == 1:
            arg_tuple += ','
        self.write('Macro(environment, macro, %r, (%s), %r, %r, %r, '
                   'context.eval_ctx.autoescape)' %
                   (name, arg_tuple, macro_ref.accesses_kwargs,
                    macro_ref.accesses_varargs, macro_ref.accesses_caller))