code: def _handle_runs(self, relpath, params):
      
      runs_by_day = self._partition_runs_by_day()
      args = self._default_template_args('run_list.html')
      args['runs_by_day'] = runs_by_day
      content = self._renderer.render_name('base.html', args).encode("utf-8")
      self._send_content(content, 'text/html')
docs: Show a listing of all pants runs since the last clean-all.