code: def p_func_args(self, p):
          'func_args : func_args COMMA expression'
          p[0] = p[1] + (p[3],)
          p.set_lineno(0, p.lineno(1)f p_func_args(self, p):
          'func_args : func_args COMMA expression'
          p[0] = p[1] + (p[3],)
          p.set_lineno(0, p.lineno(1))
docs: func_args : func_args COMMA expression