Merge pull request #345 from elbeno/counting-iterator-docs #963

Job	Run time
mutate	5m 25s
quality_checks_pass	49s
valgrind	5m 37s
sanitize (thread, clang)	5m 47s
sanitize (address, clang)	5m 42s
sanitize (address, gcc)	4m 29s
sanitize (undefined, clang)	5m 42s
sanitize (undefined, gcc)	4m 41s
sanitize (thread, gcc)	4m 42s
build_and_test_24 (clang, 20, 23, libstdc++, Debug)	5m 45s
build_and_test_24 (gcc, 13, 23, libstdc++, Debug)	4m 36s
build_and_test_24 (clang, 18, 23, libstdc++, Debug)	5m 36s
build_and_test_24 (clang, 19, 23, libstdc++, Debug)	5m 18s
build_and_test_24 (clang, 22, 23, libc++, Debug)	6m 14s
build_and_test_24 (clang, 20, 23, libc++, Debug)	6m 17s
build_and_test_24 (gcc, 12, 23, libstdc++, Debug)	4m 23s
build_and_test_24 (clang, 21, 23, libc++, Debug)	6m 2s
build_and_test_24 (clang, 21, 23, libstdc++, Debug)	5m 30s
build_and_test_24 (clang, 19, 23, libc++, Debug)	6m 12s
build_and_test_24 (gcc, 14, 23, libstdc++, Debug)	5m 8s
build_and_test_24 (clang, 18, 23, libc++, Debug)	7m 39s
build_and_test_24 (clang, 22, 23, libstdc++, Debug)	6m 0s
merge_ok	5s
	1h 57m 39s

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