# File test/unit/assertions.rb, line 212
      def assert_not_equal(expected, actual, message="")
        full_message = build_message(message, expected, actual) do |arg1, arg2|
          "<#{arg1}> expected to be != to\n" +
          "<#{arg2}>"
        end
        assert_block(full_message) { expected != actual }
      end