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$NetBSD: patch-an,v 1.1 2006/10/22 20:29:49 rillig Exp $

--- tools/backupdir.orig	2000-02-24 23:37:28.000000000 +0100
+++ tools/backupdir	2006-10-22 22:27:51.000000000 +0200
@@ -25,7 +25,7 @@ do
 	    revisions=$pwd/$subdir-$date.revisions.gz
 
 	    # If there is no backup, make one
-	    if [ z"$olddiff" == z  ] ; then 
+	    if [ z"$olddiff" = z  ] ; then 
 	    	echo "No backup for $dir/$subdir, making one"
 		(cd $dir/$subdir; cvs diff -u -N . 2> /dev/null |
 		    gzip -9 > $diff)