anchor.diff:        // Try to load json and remove blocks.
         try {
           Map json = jsonDecode(utf8.decode(data));
  -        Map jsonModified = new Map.from(json);
  +        Map jsonModified = new Map.of(json);
           List packages = json["packages"];
           List packagesModified = new List.from(packages);
           jsonModified["packages"] = packagesModified;
  
positive.code: 
      if (!limitTo1) {
        if (await _shouldQuit()) return;
        Map<Uri, Uint8List> copy = new Map.from(_fs.data);
        // Try to remove content of i and the next 9 (10 files in total).
        for (int j = uriIndex; j < uriIndex + 10 && j < uris.length; j++) {
          Uri uri = uris[j];
  
negative.code: 
      // TODO(jensj): don't use full uris.
      print("""
  # Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
  # for details. All rights reserved. Use of this source code is governed by a
  # BSD-style license that can be found in the LICENSE.md file.
  
  