anchor.diff:  
       var fooBarCreated =
   	document.$dom_createElement(Foo.tag, Bar.tag);
  -    expect(fooBasedCreated.outerHtml, '<x-foo is="x-bar"></x-foo>');
  +    expect(fooBarCreated.outerHtml, '<x-foo is="x-bar"></x-foo>');
       expect(fooBarCreated is Foo, isTrue);
   
       var barFooCreated = document.$dom_createElement(Bar.tag,
  
positive.code:     expect(quxNewed.outerHtml, quxOuterHtml);
      expect(quxNewed is Qux, isTrue);
      expect(quxNewed is InputElement, isTrue);
      expect(isFormElement(quxNewed), isTrue);
  
      // new Element.tag
  
  
negative.code:   var testForm = new FormElement()..id = 'testForm';
    document.body.append(testForm);
  
    var isFormControl = (element) {
      testForm.append(element);
      return element.form == testForm;
    };
  