Hi, I would like to ask permission to merge some changes to Boost.Locale which mostly change only the test. They fix ome spurious test failures during parallel test execution caused by accesses to the same file(s). And also a fix for a warning in a user visible header. There is no change in behavior neither in the the library nor in the tests although one of the tests got a bit refactored to make it easier to read and understand and an additional test added to reproduce the warning (fixed above) in an isolated place. The commits have been cherry-picked from develop to exclude a possibly behavior change introduced as a workaround for rare issue. PR (to master) currently running CI is https://github.com/boostorg/locale/pull/143 Thanks, Alex