constructor(val, quote) {
    super();
    this.val = val;
    this.string = val;
    this.prefixed = false;
    if (typeof quote !== 'string') {
      this.quote = "'";
    } else {
      this.quote = quote;
    }
  }
Initialize a new `String` with the given `val`.

@param {String} val
@param {String} quote
@api public