Exception when command is not given

[Lee-W]

e.g., cz --debug, cz --name <anything>

[Lee-W]

The PR has been merged. Should we close this issue? Or, we can mark it as 2.0 so that we'll know to fix the # TODO.

[woile]

@Lee-W could you elaborate what needs to be done for this?

[Lee-W]

It is already fixed for 1.* All we need to do is remove the corresponding line (I mark a TODO: remove in 2.0), and then we can close this issue.

[Lee-W]

close by #230