autodoc.pl: fix typos #492

Job	Run time
involved_authors_debug	0s
Sanity: Linux -Dusethreads	10m 11s
install	10m 10s
linux (-Uusethreads)	9m 17s
linux i386/ubuntu (-Dusedevel)	15m 40s
linux (-Duseshrplib -Dusequadmath -Dusecbacktrace -Dusethreads)	11m 5s
Windows mingw64	33m 10s
cygwin	33m 12s
linux (-Duserelocatableinc)	9m 24s
macOS (big sur) xcode 13 (-Uusethreads)	16m 11s
linux (-Dcc='clang')	9m 50s
macOS (big sur) xcode 13 (-Duseithreads -Duseshrplib)	17m 57s
Windows msvc142	51m 6s
linux (-Dcc='g++')	9m 23s
linux (-Accflags=-DSILENT_NO_TAINT_SUPPORT)	9m 13s
ASAN (-Accflags=-DPURIFY)	18s
dist-modules (latest)	2m 37s
linux (-Accflags=-DNO_TAINT_SUPPORT)	9m 12s
ASAN (-DDEBUGGING)	32s
dist-modules (5.24)	2m 36s
ASAN (-Dusethreads)	16s
dist-modules (5.10)	2m 18s
dist-modules (5.8)	2m 22s
linux (-DDEBUGGING -Accflags=-DPERL_RC_STACK)	9m 27s
Test dist/ modules on MacOS system perl	5m 30s
linux (-Uusedl)	9m 5s
minitest	3m 40s
PERL_UNICODE (-Uusethreads)	8m 21s
PERL_UNICODE (-Dusethreads -Accflags=-DPURIFY -Dcc='gcc -fsanitize=address' -Dld='gcc -fsanitize=...	2h 4m 58s
	7h 7m 1s

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