Fixups for cw/submodule-merge-messages

This series fixes a few issues I noted in cw/submodule-merge-messages (which merged to next a few days ago). Sorry for not responding before that topic merged to next; I caught Covid near the end of my vacation and it took me out for a while. So here are a few patches on top instead.

Changes since v1:

* rebased directly on top of Calvin's patch, allowing Junio's patch in cw/submodule-merge-messages to be dropped.

Changes since v2:

* changed the second patch to instead initialize sub_flag to CONFLICT_SUBMODULE_FAILED_TO_MERGE, as suggested by Junio. (thanks!)

Elijah Newren (3):
merge-ort: remove translator lego in new "submodule conflict
suggestion"
merge-ort: avoid surprise with new sub_flag variable
merge-ort: provide helpful submodule update message when possible

 merge-ort.c | 104 +++++++++++++++++-----------------------------------
 1 file changed, 34 insertions(+), 70 deletions(-)

base-commit: 4057523a4061092e9181220d54dca9eadcb75bdc
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1325%2Fnewren%2Fsubmodule-merge-messages-fixups-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1325/newren/submodule-merge-messages-fixups-v3
Pull-Request: https://github.com/gitgitgadget/git/pull/1325

Range-diff vs v2:

 1:  374278c6a1d = 1:  374278c6a1d merge-ort: remove translator lego in new "submodule conflict suggestion"
 2:  340c0f46f74 < -:  ----------- merge-ort: add comment to avoid surprise with new sub_flag variable
 -:  ----------- > 2:  48200773a1b merge-ort: avoid surprise with new sub_flag variable
 3:  80207d18334 = 3:  4c4a8f028d4 merge-ort: provide helpful submodule update message when possible

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