Exercise enums1.rs could be clearer about value-less enum variants

[E-Geraet]

Hey there!

I just went through the enums1.rs exercise, and I found the instructions a little confusing at first.

The comment says:

// TODO: Define a few types of messages as used below.

But in the main() function, you see things like Message::Resize, Message::Move, etc.
and that kind of looks like those variants might take values (especially after doing the structs exercises).
So I initially tried adding values or thinking I had to pass in data like Message::Resize(800, 600).

Turns out, all of those variants are meant to be value-less, which is super simple once you know — but it wasn’t totally obvious from the comment.

Suggestion: maybe make the comment a bit more explicit, like:

// TODO: Define the message types used below.
// These are simple enum variants with no data.

Small change, but I think it might help people avoid overthinking the task.

Thanks for this awesome project!

[khanSoliheen]

Please find the PR here

[mo8it]

I get the confusion, but it is something you can learn after reading about enums. We don't want the exercises to be as easy as possible.