bug#20744: shell-quote-argument in Emacs 24.5 and Emacs 25 on Windows cannot figure out path correctly

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: 20744@debbugs.gnu.org,  zhangda82@gmail.com
> Date: Sun, 07 Jun 2015 20:47:09 -0400
> 
> 
> I think the actual answer for Bash is the "metacharacters" list in the
> Bash manual, plus the "!" character (for history), as per:
> 
> http://www.gnu.org/software/bash/manual/html_node/Quoting.html
> 
> That doesn't include ":", but then there's those "really weird shells",
> whatever they may be...

Perhaps we could have a branch for Bash only.