anchor.diff:      }
     }
   
  -  GitObject([this._sha, this.data]);
  +  GitObject([this.sha, this.data]);
   
     // The type of git object.
     String type;
     dynamic data;
  -  String _sha;
  +  String sha;
   
     String toString() => data.toString();
   }
  
positive.code: 
    CommitObject(String sha, var data, [rawObj]) {
      this.type = ObjectTypes.COMMIT_STR;
      this._sha = sha;
      this.rawObj = rawObj;
  
      if (data is Uint8List) {
  
negative.code:   }
  
    String toString() {
      String str = "commit " + sha + "\n";
      str += "Author: " + author.name + " <" + author.email + ">\n";
      str += "Date:  " + author.date.toString() + "\n\n";
      str += _message;
  