please shellcheck

home/private_bin/executable_get-updates

@@ -18,13 +18,13 @@ header() {
 
 updates_output() {
 	notify=$1
-	if ! [[ -z $updates_arch ]]; then
+	if [[ -n $updates_arch ]]; then
 		header
 		echo "ARCH: $(echo "$updates_arch" | wc -l)"
 		header
 		[[ -z $notify ]] && echo "$updates_arch"
 	fi
-	if ! [[ -z $updates_aur ]]; then
+	if [[ -n $updates_aur ]]; then
 		header
 		echo "AUR: $(echo "$updates_aur" | wc -l)"
 		header
@@ -35,7 +35,7 @@ updates_output() {
 
 update_system() {
 	echo
-	read -p "Would you like to update? (y/N): " confirm && [[ $confirm == [yY] || $confirm == [yY][eE][sS] ]] || exit 1
+	read -r -p "Would you like to update? (y/N): " confirm && [[ $confirm == [yY] || $confirm == [yY][eE][sS] ]] || exit 1
 	pikaur -Syu --noedit --nodiff
 }
 
@@ -48,7 +48,7 @@ for opt in "$@"; do
 		notify=1
 		shift
 		;;
-	-* | --*)
+	-*)
 		echo "Invalid option: $opt"
 		usage
 		exit 1
@@ -68,10 +68,10 @@ if [[ -z $updates_info ]]; then
 	exit 0
 fi
 
-if ! [[ -z $notify ]]; then
+if [[ -n $notify ]]; then
 	notify-send -w "System Updates Available!" "$updates_info"
 else
-	echo "System Updates Available!"
+	echo "nystem Updates Available!"
 	echo "$updates_info"
 	update_system
 fi