anchor.diff:  
     test_ConditionalExpression_elseExpression_empty() {
       // SimpleIdentifier  ConditionalExpression  ReturnStatement
  -    addSource('/testA.dart', '''
  +    addSource(
  +        '/testA.dart',
  +        '''
         int T1;
         F1() { }
         class A {int x;}''');
  
positive.code: 
    test_PrefixedIdentifier_library_typesOnly2() {
      // SimpleIdentifier  PrefixedIdentifier  TypeName
      addSource('/testB.dart', '''
        lib B;
        var T1;
        class X { }
  
negative.code:   }
  
    CompletionSuggestion assertSuggestConstructor(String name,
        {int relevance: DART_RELEVANCE_DEFAULT,
        String importUri,
        int elemOffset}) {
      CompletionSuggestion cs = assertSuggest(name,
          relevance: relevance, importUri: importUri, elemOffset: elemOffset);
  