bug#9792: 24.0.50; process-file and space in filename

[Eli Zaretskii]

> Date: Wed, 19 Oct 2011 11:43:53 +0800
> From: Leo <sdl.web@gmail.com>
> 
> To reproduce:
> 
> 1. M-x cd a directory of git repo which has a master branch
> 2. Eval: (apply 'process-file "git" nil t nil '("--no-pager" "log"
> "--pretty=format:* %H %s" "HEAD..origin/master"))
> 
> to get this message:
> 'c:\Program' is not an internal or external command ...
> 
> (executable-find "git") => "c:/Program Files (x86)/Git/cmd/git.cmd"

Please produce a Lisp-level backtrace for this.  I think there's a
call to shell-quote-argument missing somewhere; a backtrace might show
where that is.