Subject: bug#23769: 25.0.95; Mode Line breakage in vc-git

From: Dmitry Gutov <[email-masked]>
Date: Fri, 17 Jun 2016 01:31:03 +0300

On 06/17/2016 01:23 AM, Phillip Lord wrote:

> In my hands this needs to be "GIT_DIR=", at least for my tests to pass!

"GIT_DIR=" turns the value into an empty string instead of nil. That 
breaks vc-git here in normal usage.