Is this really necessary? Would this mean the "alternative style" would force this:

```ruby
module Foo::Bar
end

module Foo::Baz
end
```

instead of

```ruby
module Foo
  module Bar
  end
  module Baz
  end
end
```

This would mean never to nest classes / modules? I like the idea of configuration, but what would be the sense?  Other cops don't have this option (like `ClassAndModuleCamelCase`) and telling the truth I don't know how to do this without a lot of afford.