Fixes the command usage printing when a required flag is missing
Disallows setting empty strings for required flags
Checklist
[x] Categorize the PR by setting a good title and adding one of the labels:
kind:bug, kind:enhancement, kind:documentation, kind:change, kind:breaking, kind:dependency
as they show up in the changelog
Summary
Checklist
kind:bug,kind:enhancement,kind:documentation,kind:change,kind:breaking,kind:dependencyas they show up in the changelog