diff-parseopt: restore -U (no argument) behavior

diff --git a/t/lib-submodule-update.sh b/t/lib-submodule-update.sh
index 51d45555494685ae421ff6c71fc4090448031332..5b56b23166bb3dea2e89cea38a19eb5698dfff53 100755 (executable)
--- a/t/lib-submodule-update.sh
+++ b/t/lib-submodule-update.sh
@@ -235,7 +235,7 @@ reset_work_tree_to_interested () {
        then
                mkdir -p submodule_update/.git/modules/sub1/modules &&
                cp -r submodule_update_repo/.git/modules/sub1/modules/sub2 submodule_update/.git/modules/sub1/modules/sub2
-               GIT_WORK_TREE=. git -C submodule_update/.git/modules/sub1/modules/sub2 config --unset core.worktree
+               # core.worktree is unset for sub2 as it is not checked out
        fi &&
        # indicate we are interested in the submodule:
        git -C submodule_update config submodule.sub1.url "bogus" &&