docs: function join(object, separator1, separator2) {
      var result = [],
          length = (object = Object(object)).length,
          arrayLike = length === length >>> 0;
  
      separator2 || (separator2 = ': ');
      each(object, function(value, key) {
        result.push(arrayLike ? value : key + separator2 + value);
      });
      return result.join(separator1 || ',');
    }