//echo -a $+($chr(123),- My Quote's -,$chr(125)) $({- My Quote's -},0)
you should be able to use either one
Code:
menu channel,status,nicklist {
  Quote System
  .Add A Quote: {
    var %newquote = $$?="What is your quote?" 
    write quotes.txt $({- My Quote's -},0) %newquote 
    msg $chan $+($chr(123),- My Quote's -,$chr(125)) Quote Added: %newquote
  }
}