bug#1206: 23.0.60; read-shell-command completion problem

[Eli Zaretskii]

> From: Chong Yidong <cyd@stupidchicken.com>
> Cc: 1206@emacsbugs.donarmstrong.com
> Date: Sat, 31 Oct 2009 17:57:03 -0400
> 
> Hi Eli,
> 
> Could you test the patch I posted at
> 
>   http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=1206

Sorry for the long delay.  I tested the patch now on MS-Windows, and I
still see two slashes, exactly like in the original report.  The
problem seems to be that minibuffer-completing-file-name is nil when
the modified code is run.