bug#6136: Emerge doesn't handle file names with spaces on MS Windows

[Eli Zaretskii]

> From: npostavs@users.sourceforge.net
> Cc: Joakim Hårsman <joakim.harsman@gmail.com>,
>   6136@debbugs.gnu.org
> Date: Sat, 06 Aug 2016 10:06:37 -0400
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > I think emerge-protect-metachars should simply use
> > shell-quote-argument, on all platforms.  Then it won't need to
> > distinguish between the different flavors, and it won't need to know
> > which characters need protection, something that is shell-dependent
> > and thus tricky even on Unix.
> 
> But the non-Windows case still uses emerge-metachars.  Should we make it
> same on all platforms:

Yes, I think so.

Thanks.