anchor.diff:        expect(extendedClass, isNotNull);
         String resolved = extendedClass.resolveReferences();
         expect(resolved, isNotNull);
  -      expect(resolved, contains('<a href="two_exports/BaseClass_class.html">BaseClass</a>'));
  +      expect(resolved,
  +          contains('<a href="two_exports/BaseClass_class.html">BaseClass</a>'));
       });
     });
   
  
positive.code: void main() {
    AnalyzerHelper helper = new AnalyzerHelper();
    String dirPath = p.join(Directory.current.path, 'test_package');
    List<LibraryElement> libElements = ['lib/example.dart', 'lib/two_exports.dart'].map((libFile) {
      Source source = helper.addSource(p.join(dirPath, libFile));
      return helper.resolve(source);
    });
  
negative.code:     Class extendedClass;
  
      setUp(() {
        twoExportsLib =
            package.libraries.firstWhere((lib) => lib.name == 'two_exports');
        assert(twoExportsLib != null);
        extendedClass = twoExportsLib.allClasses
            .firstWhere((clazz) => clazz.name == 'ExtendingClass');
      });
  
      test('references are correct', () {
  