validp=t
case "$thing" in
- *"$nl"*) validp=nil ;;
- *) if ! expr >/dev/null "Q$thing" : "Q$ckpat\$"; then validp=nil; fi ;;
+ *"$nl"*)
+ validp=nil
+ ;;
+ *)
+ if ! expr >/dev/null "Q$thing" : "\(Q$ckpat\)\$"; then
+ validp=nil
+ fi
+ ;;
esac
case $validp in
nil) echo >&2 "$quis: bad $ckwhat \`$thing'"; exit 1 ;;