code: function _list (str, isOrdered) {
    if (!str) return str;
  
    var $ = cheerio.load(str);
    var listEl = isOrdered ? 'ol' : 'ul';
  
    $(listEl).each(function (i, el) {
      var $out = cheerio.load('<p></p>');
      var $el = $(el);
  
      $el.find('li').each(function (j, li) {
        var tick = isOrdered ? String(j + 1) + '.' : '-';
  
        $out('p').append(tick + ' ' + _escapeHtml($(li).text()) + '<br />');
      });
  
      // avoid excess spacing coming off last element
      // (we are wrapping with a <p> anyway)
      $out('br').last().remove();
  
      $el.replaceWith($out.html());
    });
  
    return $.html();
  }
docs: "private" helper for list processing into plaintext