Fix a doc comment typo #1767

Job	Run time
macos-aarch64	2m 40s
linux_native_builds (x86_64-unknown-linux-gnu)	3m 6s
macos	4m 4s
linux_native_builds (x86_64-unknown-linux-musl)	3m 2s
minver	11s
rust_stable	1m 54s
rustfmt	12s
solaris (x86_64-pc-solaris)	3m 47s
tier3 (x86_64-unknown-dragonfly)	32s
tier3 (x86_64-unknown-openbsd)	35s
tier3 (x86_64-unknown-haiku)	32s
tier3 (armv7-unknown-linux-uclibceabihf)	36s
tier3 (i686-unknown-hurd-gnu)	32s
redox	17s
cross (arm-unknown-linux-gnueabi)	1m 56s
cross_compiling (aarch64-linux-android)	35s
cross (armv7-unknown-linux-gnueabihf)	1m 47s
cross_compiling (arm-linux-androideabi)	38s
cross (i686-unknown-linux-gnu)	2m 1s
cross (i686-unknown-linux-musl)	2m 14s
cross_compiling (armv7-linux-androideabi)	36s
cross (mips-unknown-linux-gnu)	1m 52s
cross_compiling (i686-linux-android)	35s
cross (mips64-unknown-linux-gnuabi64)	2m 14s
cross_compiling (x86_64-linux-android)	39s
cross_compiling (arm-unknown-linux-musleabi)	43s
cross (mips64el-unknown-linux-gnuabi64)	2m 8s
cross_compiling (x86_64-unknown-fuchsia)	36s
cross (mipsel-unknown-linux-gnu)	2m 2s
cross_compiling (x86_64-unknown-illumos)	33s
cross (powerpc64le-unknown-linux-gnu)	1m 53s
cross_compiling (aarch64-apple-ios, true)	34s
cross (loongarch64-unknown-linux-gnu)	2m 4s
cross_compiling (powerpc64-unknown-linux-gnu)	43s
cross_compiling (s390x-unknown-linux-gnu)	45s
cross_compiling (x86_64-unknown-linux-gnux32)	42s
cross_compiling (x86_64-unknown-netbsd)	35s
	50m 25s

Provide feedback