From 039b5d42fb0f2b54934831dded9e6f66543efd81 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lawrence=20Vel=C3=A1zquez?= <larry.velazquez@gmail.com>
Date: Fri, 8 Mar 2024 23:21:13 -0500
Subject: [PATCH] Added x-hack to expr example for safety

---
 SC3015.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/SC3015.md b/SC3015.md
index 6251ad5..74b0847 100644
--- a/SC3015.md
+++ b/SC3015.md
@@ -13,7 +13,8 @@ fi
 
 ```sh
 #!/bin/sh
-if expr "$var" : '.*foo[0-9]\{1,\}' >/dev/null; then
+# Use the x-hack to handle strings like '('.
+if expr "X$var" : 'X.*foo[0-9]\{1,\}' >/dev/null; then
   echo matched
 fi
 ```