technomancy/clojure-mode — pull request #116 by bbatsov (2012-12-27 19:30:01+00:00)
Title: More robust file extension regex

`\'` is a more robust way to check for the end of string in Emacs Lisp. Details can be found here http://www.gnu.org/software/emacs/manual/html_node/elisp/Regexp-Special.html#Regexp-Special and here http://www.gnu.org/software/emacs/manual/html_node/elisp/Regexp-Backslash.html#Regexp-Backslash

Most idiomatic Emacs Lisp code uses `\'` instead of `$`.