From 27f42beb8127d4ec0b7f21eaec5f573c29bc1e85 Mon Sep 17 00:00:00 2001
From: vr8ce <alias@letterboxes.org>
Date: Fri, 19 Jun 2020 22:56:55 -0500
Subject: [PATCH] Tighten numeric regex

---
 bin/git-undo | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/git-undo b/bin/git-undo
index 5cccbfe..bd561a8 100755
--- a/bin/git-undo
+++ b/bin/git-undo
@@ -64,7 +64,7 @@ EOL
     ;;
 esac
 
-if [[ ! $parm2 =~ [1-9]*([0-9]) ]]; then
+if [[ ! $parm2 =~ ^[1-9][0-9]*$ ]]; then
     echo "Invalid undo count: $parm2"
     exit 1
 fi