Quack enhances Emacs support for Racket and Scheme. Note: Quack is getting old, but still useful. I implemented most of a replacement for Quack, called Meow, which does a proper parse rather than use Regexp kludges, but got interrupted and didn't finish it. For now, if you're using Racket, you probably want to use Greg Hendershott's racket-mode. You can download file quack.el, version 0.48 (2016-0