anchor.diff:  
   final Directory testPackageBadDir = new Directory('testing/test_package_bad');
   final Directory testPackageDir = new Directory('testing/test_package');
  -final Directory testPackageExperimentsDir = new Directory('testing/test_package_experiments');
  +final Directory testPackageExperimentsDir =
  +    new Directory('testing/test_package_experiments');
   final Directory testPackageMinimumDir =
       new Directory('testing/test_package_minimum');
   final Directory testPackageWithEmbedderYaml =
  
positive.code: 
    testPackageGraphExperiments = await bootBasicPackage(
        'testing/test_package_experiments', [],
        additionalArguments: additionalArguments + ['--enable-experiment', 'set-literals']
    );
  
    testPackageGraphSmall = await bootBasicPackage(
        'testing/test_package_small', [],
  
negative.code:       coverageResult = new Completer();
        // This must be added before awaiting in this method.
        coverageResults.add(coverageResult.future);
        arguments = [
          '--disable-service-auth-codes',
          '--enable-vm-service:0',
          '--pause-isolates-on-exit'
        ]..addAll(arguments);
        if (!environment.containsKey('DARTDOC_COVERAGE_DATA')) {
          environment['DARTDOC_COVERAGE_DATA'] = tempDir.path;
        }
  