anchor.diff:    final env = parseArgs(arguments);
   
     List files = filesToProcess(env.input);
  -  int start = new DateTime.now().millisecondsSinceEpoch;
     if (env.verbose) {
       print('Environment:');
       print('  # files: ${files.length}');
  
positive.code:     print('  package-root: ${env.pkgRoot}');
    }
  
    var hitmap = await parseCoverage(files, env.workers);
  
    // All workers are done. Process the data.
    if (env.verbose) {
      final end = new DateTime.now().millisecondsSinceEpoch;
      print('Done creating a global hitmap. Took ${end - start} ms.');
    }
  
    String output;
  
negative.code:   env.output.write(output);
    await env.output.flush();
    if (env.verbose) {
      print('Done flushing output. Took ${clock.elapsedMilliseconds} ms.');
    }
  
    if (env.verbose) {
  