anchor.diff:    void reportDivergence(
         TestResult result1, TestResult result2, bool outputDivergence) {
       numDivergences++;
  -    print('\n\nDIVERGENCE $version:$seed : ${runner1.description} vs. '
  -        '${runner2.description}\n');
  +    print('\n${isolate}: !DIVERGENCE! $version:$seed');
       if (outputDivergence) {
  -      print('out1:\n${result1.output}\n\nout2:\n${result2.output}\n');
  +      print('out1:\n${result1.output}\nout2:\n${result2.output}\n');
       }
     }
   
  
positive.code:     fileName = '${tmpDir.path}/fuzz.dart';
      runner1 = TestRunner.getTestRunner(mode1, top, tmpDir.path, env);
      runner2 = TestRunner.getTestRunner(mode2, top, tmpDir.path, env);
      numTests = 0;
      numSuccess = 0;
      numNotRun = 0;
  
negative.code:   String fileName;
    TestRunner runner1;
    TestRunner runner2;
    String isolate;
    int seed;
  
    // Stats.
  