test_cmp: do not use "diff -u" on platforms that lack one

diff --git a/revision.c b/revision.c
index f4b8b383153b2330be1729fa29488bab1848e019..b209d493e169ae58130a998f7dc1239f5a385c44 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -1781,7 +1781,7 @@ int prepare_revision_walk(struct rev_info *revs)
 enum rewrite_result {
        rewrite_one_ok,
        rewrite_one_noparents,
-       rewrite_one_error,
+       rewrite_one_error
 };
 
 static enum rewrite_result rewrite_one(struct rev_info *revs, struct commit **pp)