[bug#74962] [PATCH 3/3] etc/guix-install.sh: Fix quoting and other issues.

[Ludovic Courtès]

Maxim Cournoyer <maxim.cournoyer@gmail.com> skribis:

> This change fixes most issues reported by the 'shellcheck' command.
>
> * etc/guix-install.sh (add_init_sys_require): Use -n instead of ! -z.
> (sys_create_build_user): Quote variable expansion.
> (sys_delete_build_user): Likewise.
> (sys_create_shell_completion): Likewise.
> (sys_delete_user_profiles): Likewise.
> (main): Replace $@ with $* inside string.
>
> Change-Id: Ia88509b461b3844f2dd5abf9fb21a5b2bbb8a1e1

LGTM.