Fix some typos, backticks, new clippy lint. #1563

Job	Run time
cargo check (aarch64-android)	26s
cargo clippy (windows-latest)	2m 49s
cargo check (msrv) (wasm32)	39s
cargo clippy (macos-latest)	1m 3s
cargo check (msrv) (windows-latest)	2m 7s
cargo clippy (ubuntu-latest)	1m 29s
cargo check (msrv) (macos-latest)	42s
cargo clippy (wasm32)	1m 21s
cargo check (msrv) (ubuntu-latest)	53s
cargo doc	59s
cargo fmt	26s
Prime LFS Cache	4s
cargo test (wasm32)	27s
typos	5s
cargo test (windows-latest)	1m 54s
cargo test (macos-latest)	1m 9s
cargo test (ubuntu-latest)	3m 30s
	20m 3s

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