Typo: Fix some typos for #3973 #3976 #3982. v6.0.114 #3156

Job	Run time
multiple-arch-armv7	5m 33s
utest-regression-blackbox-test	4m 59s
cygwin64-cache	2m 45s
multiple-arch-aarch64	5m 35s
cygwin64	7m 23s
fast	1s
build-ubuntu16	1m 31s
build-ubuntu18	1m 34s
build-cross-aarch64	2m 25s
build-centos7	2m 18s
build-cross-arm	2m 22s
build-ubuntu20	1m 48s
coverage	2m 29s
multiple-arch-amd64	1m 21s
test-done	1s
	42m 5s

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