anchor.diff:  
     // ignore: non_constant_identifier_names
     void test_suggestContainsIsInvalid() {
  -    final selector = new ContainsSelector("foo");
  +    final selector = ContainsSelector("foo");
   
       final suggestions = _evenInvalidSuggestions(selector);
       expect(suggestions.length, 1);
  
positive.code: class HtmlTagForSelectorTest {
    // ignore: non_constant_identifier_names
    void test_addClassMultipleTimesOKDoesntRepeat() {
      final tag = new HtmlTagForSelector()
        ..name = "tagname"
        ..addClass("myclass");
      // ignore: cascade_invocations
  
negative.code: class SuggestTagsTest {
    // ignore: non_constant_identifier_names
    void test_suggestAndMergesSuggestionConstraints() {
      final nameSelector =
          ElementNameSelector(SelectorName('panel', SourceRange(10, 5), null));
      final attrSelector = AttributeContainsSelector(
          SelectorName('attr', SourceRange(10, 5), null), "value");
      final selector = AndSelector([nameSelector, attrSelector]);
  
      final suggestions = selector.suggestTags();
      expect(suggestions.length, 1);
  