Rust API Guidelines: `Debug` representation is never empty

[mcarton]

As per Debug representation is never empty.
I wonder if someone really did that for it to get into those guidelines 😮

[dtolnay]

Yes. bitflags/bitflags#64

[DylanVener]

I'm going to take a crack at it

[oli-obk]

Great! It's all yours

[DylanVener]

@Manishearth
Question: Is it preferred for a lint to be implemented in its own file, or for it to be added onto another lint source file which does similar checks?

For my particular case, while reading through lints to get an idea of how to write them, I found derive.rs which already contains a couple lints for derivations. Should I just add this new lint to that file, or create a separate "empty_debug" lint?

Thanks!

[Manishearth]

If you can find such a file, please add it to that file, otherwise feel free to create a new file.