introduce "extensions" form of core.repositoryformatversion

diff --git a/t/t2202-add-addremove.sh b/t/t2202-add-addremove.sh
index 6a8151064c8256bd03a90460eb1bd6970428f2f0..fc8b59e7f7796c075b7fd03145e5f9c69625403b 100755 (executable)
--- a/t/t2202-add-addremove.sh
+++ b/t/t2202-add-addremove.sh
@@ -41,4 +41,14 @@ test_expect_success 'git add --all' '
        test_cmp expect actual
 '
 
+test_expect_success 'Just "git add" is a no-op' '
+       git reset --hard &&
+       echo >will-remove &&
+       >will-not-be-added &&
+       git add &&
+       git diff-index --name-status --cached HEAD >actual &&
+       >expect &&
+       test_cmp expect actual
+'
+
 test_done