Expand @() as it fails when extglob is not set
Created by: Strahinja
Currently, as per #102 (closed), sourcing /usr/lib/initcpio/functions when extglob
is not set in Bash produces an error. This PR expands the case pattern so @()
extended pattern is not used.
The alternative would be to force shopt -s extglob
at the top of the file, but that wouldn't respect user's choice for this option.