[geospeck]

Yukihiro Matsumoto is an Emacs user as well[1]. He is also the original author of ruby-mode.el[2].

[1] https://news.ycombinator.com/item?id=6094610 [2] https://github.com/emacs-mirror/emacs/blob/master/lisp/progm...

[dasyatidprime]

That's the source! That's the one I remembered but couldn't find! Thank you.

[mghackerlady]

He also wrote a emacs mail client