[feature request] completion for --help/--version

[silvioprog]

Hi.

It would be nice to allow the user to auto complete flags like --help, --version` etc.

For example, the git completion allows git --v[TAB] to auto complete to git --version.

TIA

[marckhouzam]

Agreed. I consider this a bug. I haven't looked at why the completion doesn't work for those flags but I feel it should.