Dump the macro definition for the def created by macro_body.

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