# File lib/kwalify/errors.rb, line 114
    def _build_message(message_key, val, args)
      msg = Kwalify.msg(message_key)
      assert_error("message_key=#{message_key.inspect}") unless msg
      msg = msg % args if args
      msg = "'#{val.to_s.gsub(/\n/, '\n')}': #{msg}" if !val.nil? && Types.scalar?(val)
      return msg;
    end