From ba08fbbb0ca5da455bf695236c57bc50e7faed50 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri, 10 Feb 2023 15:33:40 -0800
Subject: diff: fix bug where -D does not work

diff --git a/src/diff.c b/src/diff.c
index dd6f63b..2b4834f 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -416,7 +416,7 @@ main (int argc, char **argv)
 	    char *base = b;
 	    int changes = 0;
 
-	    for (i = 0; i < sizeof sizeof C_ifdef_group_formats; i++)
+	    for (i = 0; i < sizeof C_ifdef_group_formats; i++)
 	      {
 		char ch = C_ifdef_group_formats[i];
 		switch (ch)