anchor.diff:      meta.attributes['content'] = 'noindex';
   
       head.insertBefore(meta, head.firstChild);
  -    head.insertBefore(new Text('\n  '), head.firstChild);
     }
   
     void _addGithubMarkdownStyle(Element head, Element body) {
  
positive.code:       lead.append(leadLink);
  
        breadcrumbs.insertBefore(lead, breadcrumbs.firstChild);
        breadcrumbs.insertBefore(
            new Text('\n  ' + '  ' * level), breadcrumbs.firstChild);
      }
    }
  
  
negative.code:       ..attributes['style'] = 'height: 30px; margin-right: 1em;';
      logoLink.append(imgRef);
      parent.insertBefore(logoLink, breadcrumbs);
    }
  
    void _addPubPackageLink(Element breadcrumbs, {int level = 1}) {
  