anchor.diff:  
       print (
           "$path-$i, "
  -        "${averageCompilationTime.toStringAsFixed(2)}ms, "
  -        "${averageAnalysisTime.toStringAsFixed(2)}ms, "
  -        "${averageCompletionTime.toStringAsFixed(2)}ms, "
  -        "${averageDocumentTime.toStringAsFixed(2)}ms, "
  -        "${averageFixesTime.toStringAsFixed(2)}ms, "
  -        "${averageFormatTime.toStringAsFixed(2)}ms"
  +        "${averageCompilationTime.toStringAsFixed(2)}, "
  +        "${averageAnalysisTime.toStringAsFixed(2)}, "
  +        "${averageCompletionTime.toStringAsFixed(2)}, "
  +        "${averageDocumentTime.toStringAsFixed(2)}, "
  +        "${averageFixesTime.toStringAsFixed(2)}, "
  +        "${averageFormatTime.toStringAsFixed(2)}"
       );
   
       if (maxMutations == 0) break;
  
positive.code:   String src = f.readAsStringSync();
    f = null;
  
    print ('Path, Compilation, Analysis, Completion, Document, Fixes, Format');
  
    for (int i = 0; i < iterations; i++) {
  
  
negative.code:   // TODO: Replace this with args package.
    int seed = 0;
    String testCollectionRoot = args[0];
    if (args.length >= 2) seed = int.parse(args[1]);
    if (args.length >= 3) maxMutations = int.parse(args[2]);
    if (args.length >= 4) iterations = int.parse(args[3]);
    if (args.length >= 5) commandToRun = args[4];
    io.Directory sdkDir = cli_util.getSdkDir([]);
  
    // Load the list of files.
  