test-rebuild.sh: diff returns non-zero when there is a diff

test-rebuild.sh

@@ -37,7 +37,7 @@ for i in $PKGS; do
   for k in list requires provides; do
     rpm -qp --$k $i.rpm | grep -v rpmlib > ../$TMP/$i.$k.test
     rpm -q --$k $i | grep -v rpmlib > ../$TMP/$i.$k.installed
-    DIFF=$(diff -u ../$TMP/$i.$k.installed ../$TMP/$i.$k.test)
+    DIFF=$(diff -u ../$TMP/$i.$k.installed ../$TMP/$i.$k.test || :)
     if [ -z "$DIFF" ]; then
 	echo "$i $k: same"
     else
@@ -46,5 +46,3 @@ for i in $PKGS; do
     fi
   done
 done
-
-ls -lt list.* provides.* requires.*