dimitri/el-get — pull request #594 by geerds (2012-02-25 21:56:22+00:00)
Title: Fix pymacs: handle empty/missing PYTHONPATH correctly

If the PYTHONPATH variable isn't set, the getenv function returns nil and concat will fail. In addition an unnecessary colon is set if the variable exists but is empty:

(setenv "PYTHONPATH" "")
...code...
(getenv "PYTHONPATH") ==> "/home/$USER/.emacs.d/el-get/pymacs:"

I hope that the code is okay, because I have no experience with Lisp :)