Auto-traits implementations shouldn't appear if empty

[GuillaumeGomez]

https://doc.rust-lang.org/nightly/std/env/struct.Args.html

[clarfonthey]

I'd argue that !Send and !Sync should show up in the auto traits section.

[GuillaumeGomez]

Hum no. It's a "manual" binding.

[clarfonthey]

It depends on if you see it as "auto trait" implementations or auto "trait implementations"

[GuillaumeGomez]

There is nothing automatic in here so I don't see where the debate is. :-/