Added new API surface in @6.6.0
LogLevelEnumtest/constant_flag.cxx
VersionClasstest/constant_flag.cxx
mainFunctiontest/constant_flag.cxx
mainFunctiontest/detect_duplicate_flags.cxx
testDuplicateLongFunctiontest/detect_duplicate_flags.cxx
testDuplicateLongInGroupFunctiontest/detect_duplicate_flags.cxx
testDuplicateLongInTwoGroupsFunctiontest/detect_duplicate_flags.cxx
testDuplicateShortFunctiontest/detect_duplicate_flags.cxx
testDuplicateShortInGroupFunctiontest/detect_duplicate_flags.cxx
testDuplicateShortInTwoGroupsFunctiontest/detect_duplicate_flags.cxx
testDuplicateWithinCommandStillDetectedFunctiontest/detect_duplicate_flags.cxx
testFlagReuseAcrossCommandBoundaryFunctiontest/detect_duplicate_flags.cxx
testFlagReuseBetweenSiblingCommandsFunctiontest/detect_duplicate_flags.cxx
testFlagReuseInNestedGroupAcrossCommandBoundaryFunctiontest/detect_duplicate_flags.cxx
mainFunctiontest/detect_duplicate_flags_noexcept.cxx
testDuplicateLongFunctiontest/detect_duplicate_flags_noexcept.cxx
testDuplicateLongInGroupFunctiontest/detect_duplicate_flags_noexcept.cxx
testDuplicateLongInTwoGroupsFunctiontest/detect_duplicate_flags_noexcept.cxx
testDuplicateShortFunctiontest/detect_duplicate_flags_noexcept.cxx
testDuplicateShortInGroupFunctiontest/detect_duplicate_flags_noexcept.cxx
testDuplicateShortInTwoGroupsFunctiontest/detect_duplicate_flags_noexcept.cxx
testDuplicateWithinCommandStillDetectedFunctiontest/detect_duplicate_flags_noexcept.cxx
testFlagReuseAcrossCommandBoundaryFunctiontest/detect_duplicate_flags_noexcept.cxx
testFlagReuseBetweenSiblingCommandsFunctiontest/detect_duplicate_flags_noexcept.cxx
testFlagReuseInNestedGroupAcrossCommandBoundaryFunctiontest/detect_duplicate_flags_noexcept.cxx
mainFunctiontest/optional_value_separation.cxx