Do we need default Usage for root command?

[teghnet]

Hi, I was wondering if the default command_setup.go:33

	if cmd.Usage == "" && isRoot {
		tracef("setting default Usage (cmd=%[1]q)", cmd.Name)
		cmd.Usage = "A new cli application"
	}

is really needed.

Would you accept a PR that removes it?

The default name makes a lot of sense, but the actual usage can be empty - sometimes root commands to not have flags, and then we need to put a space ( ) in the Usage field.

[dearchap]

@teghnet any reason you are not using v3 ? v2 is in maintenance mode

[teghnet]

This is v3 @dearchap