zimbatm/direnv — pull request #115 by pwaller (2014-04-26 15:25:31+00:00)
Title: Fix issue #114 - work for blank envs

I've tested this by:

1) Setting a variable to emptystring inside .envrc

2) Setting the variable to emptystring and then making .envrc `unset` the variable.

Please help me find more corner cases I haven't thought of.