code: function length(description) {
    if (arguments.length < 2) {
      throw new Error('Handlebar Helper \'length\'' +
      ' needs 1 parameter');
    }
  
    if ((typeof description) !== 'string') {
      throw new TypeError('Handlebars Helper \'length\'' +
        'requires path to be a string');
    }
  
    var desc = description;
    if (len !== -1) {
      description = strObj(description).truncate(len - 50).s;
    }
  
    return jsStringEscape(description);
  }
docs: split the long description into multiple lines
  @param  {string} description  request description to be splitted
  @returns {string}        multiple lines