anchor.diff:    String indent(String s) => s.splitMapJoin('\n', onNonMatch: (n) => '    $n');
   
     sections.forEach((section, examples) {
  +    if (specifiedSection != null && section != specifiedSection) {
  +      return;
  +    }
       for (var e in examples) {
         var output;
         var nestedMap =
  
positive.code:     .path);
  
  void main(List<String> args) {
    var raw = args.any((s) => s == '--raw');
    var verbose = args.any((s) => s == '--verbose');
  
    var sections = loadCommonMarkSections();
  
  
negative.code:       var actual = parseFragment(output);
        nestedMap[e.example] = compareHtml(expected.children, actual.children);
        if (verbose && !nestedMap[e.example]) {
          print('FAIL: http://spec.commonmark.org/0.24/#example-${e.example}');
          print('input:');
          print(indent(e.markdown));
          print('expected:');
  