code: function(str) {
      return (_.startsWith(str, '"') && _.endsWith(str, '"') && !_.includes(_.trim(str, '"'), '"')) ||
        (_.startsWith(str, "'") && _.endsWith(str, "'") && !_.includes(_.trim(str, "'"), "'"))
    }
docs: Check if a string is a proper atomic quote: without internal quotes.
  @private
  @param  {string}  str
  @return {Boolean}