docs: function Doc(runner) {
    Base.call(this, runner);
  
    var self = this
      , stats = this.stats
      , total = runner.total
      , indents = 2;
  
    function indent() {
      return Array(indents).join('  ');
    }
  
    runner.on('suite', function(suite){
      if (suite.root) return;
      ++indents;
      console.log('%s<section class="suite">', indent());
      ++indents;
      console.log('%s<h1>%s</h1>', indent(), utils.escape(suite.title));
      console.log('%s<dl>', indent());
    });
  
    runner.on('suite end', function(suite){
      if (suite.root) return;
      console.log('%s</dl>', indent());
      --indents;
      console.log('%s</section>', indent());
      --indents;
    });
  
    runner.on('pass', function(test){
      console.log('%s  <dt>%s</dt>', indent(), utils.escape(test.title));
      var code = utils.escape(utils.clean(test.fn.toString()));
      console.log('%s  <dd><pre><code>%s</code></pre></dd>', indent(), code);
    });
  }