Improvements to docs #313

Job	Run time
cargo check (msrv) (windows-latest)	1m 19s
cargo clippy (android) (armv7-linux-androideabi)	1m 37s
cargo clippy (windows-latest)	4m 25s
cargo check (msrv) (macos-latest)	31s
cargo check (msrv) (android) (armv7-linux-androideabi)	31s
cargo clippy (macos-latest)	1m 53s
cargo clippy (android) (aarch64-linux-android)	1m 39s
cargo check (msrv) (ubuntu-latest)	28s
cargo clippy (android) (x86_64-linux-android)	1m 35s
cargo clippy (ubuntu-latest)	2m 1s
cargo check (msrv) (android) (aarch64-linux-android)	33s
cargo check (msrv) (android) (x86_64-linux-android)	40s
cargo doc (windows-latest)	1m 16s
cargo fmt	20s
cargo test (windows-latest)	1m 18s
cargo doc (macos-latest)	34s
typos	5s
cargo test (macos-latest)	38s
cargo doc (ubuntu-latest)	18s
cargo test (ubuntu-latest)	24s
	22m 5s

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