Merge branch 'km/submodule-add-errmsg'

Improve error message generation for "git submodule add". * km/submodule-add-errmsg: submodule add: show 'add --dry-run' stderr when aborting

Junio C Hamano committed Feb 5, 2020 at 14:34 UTC 25794d6ce9f34ed5dedc569c5050afdb04518744

No changes.