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

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Thu, 16 Jun 2016 23:37:06 -0400
> Cc: 23769@debbugs.gnu.org, Phillip Lord <phillip.lord@russet.org.uk>
> 
> On Thu, Jun 16, 2016 at 10:41 PM, Dmitry Gutov <dgutov@yandex.ru> wrote:
> > Could this feature be actually broken? Or how does Git ignore the
> > modification?
> >
> > "To use ‘process-environment’ to
> > remove an environment variable, include only its name in the list,
> > without "=VALUE"."
> 
> Turns out this feature is broken, see
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=23779

(setenv "FOO") works for me.