anchor.diff:    }
   
     void _addPackageSuggestions(String partial) {
  -    SourceFactory factory = request.sourceFactory;
  -    Map<String, List<Folder>> packageMap = factory.packageMap;
  +    var factory = request.sourceFactory;
  +    var packageMap = factory.packageMap;
       if (packageMap != null) {
         _addSuggestion('package:');
  -      packageMap.forEach((String pkgName, List<Folder> folders) {
  -        String prefix = 'package:$pkgName/';
  +      packageMap.forEach((pkgName, folders) {
  +        var prefix = 'package:$pkgName/';
           _addSuggestion(prefix);
  -        for (Folder folder in folders) {
  +        for (var folder in folders) {
             if (folder.exists) {
               _addPackageFolderSuggestions(partial, prefix, folder);
             }
  
positive.code:       dirPath = dirPath.substring(0, dirPath.length - 1);
      }
  
      Resource dir = resProvider.getResource(dirPath);
      if (dir is Folder) {
        try {
          for (Resource child in dir.getChildren()) {
            String completion;
            if (child is Folder) {
              if (!child.shortName.startsWith('.')) {
  
negative.code:             // Quoted empty string
              visitSimpleStringLiteral(uri);
            } else {
              var data = request.sourceContents;
              if (end == data.length) {
                var ch = data[end - 1];
                if (ch != '"' && ch != "'") {
                  // Insertion point at end of file
                  // and missing closing quote on non-empty string
  