I remember that there was a mode for Emacs, or was it an option, can't recall, that prettified the code by placing space after operators like ,, ., wrapped = with spaces, and some other cools stuff that I can't remember.
I reckon that this is pretty much language-specific issue, but I usually put space after commas, and wrap = with spaces. Any ideas about this mode?
You're probably thinking of smart-operator.el.
How about smartchr.el?
This is probably not what you are trying to recall, but I'm sure it works nicely for that purpose.
For example:
(require 'smartchr)
(global-set-key (kbd "=") (smartchr '(" = " " == " "=")))
With this configuration, when you type = several times, = is inserted and it rotates to == to = then back to = .
Here is an introduction by the author (written in Japanese, but with a demo video and example of configuration): http://tech.kayac.com/archive/emacs-tips-smartchr.html
