[PATCH] [doc] Mention that "set environment" affects the shell too.

[Eli Zaretskii]

> Date: Fri, 10 Jan 2014 15:18:44 +0000
> From: Pedro Alves <palves@redhat.com>
> 
> Looking through my local branches, I found this leftover patch
> from when I made "set startup-with-shell" a runtime knob a while
> ago...
> 
> OK?

Yes, thanks.