Fix [a0d6ef020b]: Documentation bugs. Some more documentation bugs (e… #618

Job	Run time
build (gcc)	1m 38s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 39s
test (gcc)	4m 9s
build (gcc, --disable-shared)	1m 41s
test (gcc, --disable-xft)	4m 30s
build (gcc, --disable-xft)	1m 40s
test (gcc, --enable-symbols)	3m 36s
build (gcc, --disable-xss)	1m 39s
build (gcc, --enable-symbols)	1m 12s
build (clang)	2m 13s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	2m 20s
build (clang, --disable-shared)	1m 50s
build (clang, --disable-xft)	1m 49s
build (clang, --disable-xss)	1m 54s
build (clang, --enable-symbols)	1m 25s
	33m 15s

Provide feedback