Warn for unknown options #201
Description
Describe the feature
Warn for unknown options could improve CLI usability and user experience.
For example, git (and others) warns about unknown options:
$ git -k
> unknown option: -k
> usage: git [-v | --version] [-h | --help] [-C <path>] [-c <name>=<value>]
> [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
> [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--no-lazy-fetch]
> [--no-optional-locks] [--no-advice] [--bare] [--git-dir=<path>]
> [--work-tree=<path>] [--namespace=<name>] [--config-env=<name>=<envvar>]
> <command> [<args>]
Additional information
- Would you be willing to help implement this feature?