I think it was left out because of the paragraph before that explains `rails plugin new` and how you can get help:

> Rails ships with a rails plugin new command which creates a skeleton for developing any kind of Rails extension with the ability to run integration tests using a dummy Rails application. See usage and options by asking for help:

I think we should integrate your patch into that command so that we get the following order:

1.) create a basic plugin (`rails plugin new yaffle`)
2.) describe how to get help about the available options

Can you try to reword this patch so that it fits into the paragraph above?