code: function parseError (parser) {
    var string = parseSimpleString(parser)
    if (string !== undefined) {
      if (parser.optionReturnBuffers === true) {
        string = string.toString()
      }
      return new ReplyError(string)
    }
  }
docs: Parse a '-' redis error response
  @param {JavascriptRedisParser} parser
  @returns {ReplyError}