# File lib/minitest/unit.rb, line 297
    def refute_respond_to obj, meth, msg = nil
      msg = message(msg) { "Expected #{mu_pp(obj)} to not respond to #{meth}" }
      flip = (Symbol === obj) && ! (Symbol === meth) # HACK for specs
      obj, meth = meth, obj if flip
      refute obj.respond_to?(meth), msg
    end