Clippy emits some warnings on the nightly toolchain

[sarkahn]

I forked the repo to contribute and was reading through CONTRIBUTE.md, one of the steps instructs you how to run CI validation. When I do so I get this error:

[bjorn3]

Which rustc version are you using? If you are using beta or nightly clippy probably added a new lint or changed one to trigger in more cases.

[sarkahn]

Which rustc version are you using? If you are using beta or nightly clippy probably added a new lint or changed one to trigger in more cases.

You're right, I was using the nightly (1.56). When I switched back to 1.54 the error went away.

The getting started guide does list switching to nightly as a way to improve compilation times, so maybe this should still be fixed?

[alice-i-cecile]

Yep, we should have a warning that small things of this nature may be broken when using nightly. That belongs in the book IMO, over on https://github.com/bevyengine/bevy-website.

[sarkahn]

As of the last rust update the false positive for collapsible-match on the nightly toolchain have been fixed. I update my pr to remove the #allows, and performing the steps from CONTRIBUTING.md no longer gives any errors:

cargo fmt --all -- --check (remove --check to let the command fix found problems)
cargo clippy --workspace --all-targets --all-features -- -D warnings -A clippy::type_complexity