anchor.diff:  
     @override
     @failingTest
  -  void test_parseListOrMapLiteral_map_noType() {
  -    super.test_parseListOrMapLiteral_map_noType();
  -  }
  -
  -  @override
  -  @failingTest
     void
         test_parsePostfixExpression_none_methodInvocation_question_dot_typeArgumentComments() {
       super
  
positive.code: 
    @override
    @failingTest
    void test_parsePrimaryExpression_mapLiteral() {
      super.test_parsePrimaryExpression_mapLiteral();
    }
  
    @override
    @failingTest
    void test_parsePrimaryExpression_mapLiteral_typed_genericComment() {
      super.test_parsePrimaryExpression_mapLiteral_typed_genericComment();
    }
  
    @override
  
negative.code: 
    @override
    Expression parsePrimaryExpression(String code) {
      return _runParser(
              code, (parser) => parser.parsePrimary, const <ErrorCode>[])
          as Expression;
    }
  
    @override
  