fix typos #941

Job	Run time
Rustfmt	8s
Test (stable)	38s
Test (1.63.0)	3m 6s
Test (beta)	29s
Test (nightly)	35s
Test (macos)	32s
Test (windows)	1m 49s
Check (aarch64-apple-ios)	13s
Check (aarch64-linux-android)	22s
Check (x86_64-apple-darwin)	20s
Check (x86_64-unknown-fuchsia)	31s
Check (x86_64-pc-windows-msvc)	16s
Check (x86_64-pc-solaris)	18s
Check (x86_64-unknown-freebsd)	17s
Check (x86_64-unknown-illumos)	9s
Check (x86_64-unknown-linux-gnu)	15s
Check (x86_64-unknown-linux-musl)	22s
Check (x86_64-unknown-netbsd)	20s
Check (x86_64-unknown-redox)	20s
Check (armv7-linux-androideabi)	10s
Check (i686-linux-android)	19s
Clippy	15s
Docs (aarch64-apple-ios)	21s
Docs (aarch64-linux-android)	23s
Docs (x86_64-apple-darwin)	16s
Docs (x86_64-unknown-fuchsia)	23s
Docs (x86_64-pc-windows-msvc)	23s
Docs (x86_64-pc-solaris)	20s
Docs (x86_64-unknown-freebsd)	19s
Docs (x86_64-unknown-illumos)	25s
Docs (x86_64-unknown-linux-gnu)	21s
Docs (x86_64-unknown-linux-musl)	26s
Docs (x86_64-unknown-netbsd)	20s
Docs (x86_64-unknown-redox)	23s
Docs (armv7-linux-androideabi)	23s
Docs (i686-linux-android)	22s
	16m 49s

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