fix fmt of optional reference #552
sanitized_ci.yml
on: push
tests-sanitize-undefined-clang
51m 39s
tests-sanitize-undefined-gcc
1h 23m
tests-sanitize-address-clang
1h 48m
tests-sanitize-address-msvc
3m 25s
tests-sanitize-address-gcc
2h 17m
tests-sanitize-memory-clang
3h 2m