Make enums of in the IO::Notification searchable

[gfldex]

Please mind the enum!

[JJ]

What do you mean here?

[AlexDaniel]

This ticket is about this, I think. There are some tests in roast here.

[JJ]

Still. Rewrite documentation? Add an example?

[AlexDaniel]

Oh, damn you're right. So IO::Notification is already doc-ed and IO::Notification::Change links to IO::Notification. That's good.

But there's this enum:

my enum FileChangeEvent (:FileChanged(1), :FileRenamed(2));

And I would say that FileChangeEvent, FileChanged, and FileRenamed should all be searchable. Once they are, feel free to close. I see nothing else to do here.