Improve documentation grammar and wording (#5052) #12825

Job	Run time
Check wasm32 + wasm-bindgen	2m 31s
cargo-deny aarch64-apple-darwin	37s
Check wasm32+atomics	1m 26s
cargo-deny aarch64-linux-android	37s
Format + check + test	5m 19s
cargo-deny i686-pc-windows-gnu	37s
cargo-deny i686-pc-windows-msvc	37s
cargo-deny i686-unknown-linux-gnu	36s
cargo-deny wasm32-unknown-unknown	40s
android	21s
cargo-deny x86_64-apple-darwin	33s
cargo-deny x86_64-pc-windows-gnu	36s
ios	19s
cargo-deny x86_64-pc-windows-msvc	37s
cargo-deny x86_64-unknown-linux-gnu	36s
Check Windows	1m 37s
cargo-deny x86_64-unknown-linux-musl	38s
cargo-deny x86_64-unknown-redox	40s
	18m 57s

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