cli: be more flexible about width when printing `--help`
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes (presumably) -
commit message follows commit guidelines
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
make -j4 test
(UNIX), or vcbuild test
(Windows) passes (presumably)