From 9cd9a789c186bfe6594c0aed8ba34c9e3d9d9292 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Mon, 7 Mar 2022 09:38:08 -0800
Subject: [PATCH] zdiff: fix arg handling bug

Problem reported by Lv Ying (Bug#54291).
* zdiff.in (escape): Handle args like '-C 5'.
---
 zdiff.in | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/zdiff.in b/zdiff.in
index a1325f2..a72d08d 100644
--- a/zdiff.in
+++ b/zdiff.in
@@ -49,14 +49,23 @@ escape='
 '
 
 while :; do
+  argdone=:
   case $1 in
   --h*) printf '%s\n' "$usage"   || exit 2; exit;;
   --v*) printf '%s\n' "$version" || exit 2; exit;;
   --) shift; break;;
-  -*\'*) cmp="$cmp '"`printf '%sX\n' "$1" | sed "$escape"`;;
+  -*\'*) argdone=false arg=$1;;
+  -[CDFISUWXx])
+    cmp="$cmp $1"
+    case ${2?} in
+    -*\'*) argdone=false arg=$2;;
+    *) cmp="$cmp '$2'";;
+    esac
+    shift;;
   -?*) cmp="$cmp '$1'";;
   *) break;;
   esac
+  $argdone || cmp="$cmp '"`printf '%sX\n' "$arg" | sed "$escape"`
   shift
 done
 cmp="$cmp --"
-- 
2.27.0