Crate naming: never use -rs or -rust suffix

[dtolnay]

We already know what language we are writing.

[lfairy]

I've seen that used because the name without the suffix was already taken. But in those cases I think it's better to choose a different name anyway.

[dtolnay]

Right. If crate lfairy already exists so you call it lfairy-rs, in my opinion that is even less inspired than calling it lfairy2.

[Kixunil]

This is true for crates themselves. I find repositories having -rs suffix useful if the name would be otherwise identical to some popular library from other language. (e.g. if repo is called json-rs I immediately know it's Rust crate.)

[lfairy]

Note that Cargo strips -rs and rust- from the crate name in cargo new already, so you have to work to circumvent this rule. See rust-lang/cargo#1532.

[dtolnay]

Added in c501a0b.