Fix using && instead of -a for AND comparison, to improve compatibility.
Fix using && instead of -a for AND comparison, to improve compatibility.

hashbang/hashbang.sh,hashbang/hashbang.sh,hashbang/hashbang.sh,hashbang/hashbang.sh,KellerFuchs/hashbang.sh,KellerFuchs/hashbang.sh,KellerFuchs/hashbang.sh