fix: properly check for invalid argument in checkpkg and diffpkg

The option switch case only matches by splitting via '|' instead of ','

1 files changed, 1 insertions, 1 deletions

diff --git a/src/diffpkg.in b/src/diffpkg.in
index 5bae805..b964d44 100644
--- a/src/diffpkg.in
+++ b/src/diffpkg.in
@@ -129,7 +129,7 @@ while (( $# )); do
 			shift
 			break
 			;;
-		-*,--*)
+		-*|--*)
 			die "invalid argument: %s" "$1"
 			;;
 		*)