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


From: Eli Zaretskii
Subject: bug#23769: 25.0.95; Mode Line breakage in vc-git
Date: Fri, 17 Jun 2016 16:21:16 +0300

> Cc: address@hidden, address@hidden
> From: Dmitry Gutov <address@hidden>
> Date: Fri, 17 Jun 2016 15:06:10 +0300
> 
> On 06/17/2016 09:54 AM, Eli Zaretskii wrote:
> 
> > (setenv "FOO") works for me.
> 
> setenv works destructively. To use it and remain good citizens, we'd 
> have to `(copy-sequence process-environment)` every time we call a Git 
> command.
> 
> Maybe that's not huge in the grand scheme of things, but it certainly 
> looks wasteful.

If you want to manually remove the variable before adding it with no
value, that will also work.  Otherwise, I see no magic that would do
anything beyond the expected effect on any list.





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