Suppress false positive wrong_self_convention clippy lint
Suppress false positive wrong_self_convention clippy lint

https://github.com/rust-lang/rust-clippy/issues/6983

    warning: methods with the following characteristics: (`to_*` and `self` type is `Copy`) usually take `self` by value
      --> src/to_tokens.rs:80:18
       |
    80 |     fn to_tokens(&self, tokens: &mut TokenStream) {
       |                  ^^^^^
       |
       = note: `#[warn(clippy::wrong_self_convention)]` on by default
       = help: consider choosing a less ambiguous name
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention

dtolnay/quote