# File lib/test/unit/xml/xml_assertions.rb, line 113
      def assert_xml_not_equal(expected_doc, actual_doc, message = nil)
        expected_doc = parse_xml(expected_doc)
        actual_doc = parse_xml(actual_doc)
        _wrap_assertion do
          full_message = build_message(message, "\n<?> expected not to be equal to\n<?> but was equal.\n", actual_doc.inspect, expected_doc.inspect)
          assert_block(full_message){ ! are_equal?(expected_doc, actual_doc)}
        end
      end