message: tests.filesystem: More robust initialization.
diff: @@ -295,12 +295,16 @@ test_xor()
  return;
  }
  std::string text = "coincoin";
  +
  + for (int i=0;
  + i<10 && (directory_count(tmpmount) != 1 || directory_count(tmpsource) != 1);
  + ++i)
  + {
  #if INFINIT_WINDOWS
  Sleep(200);
  #else
  ::usleep(200000);
  #endif
  - {
  fs::ofstream ofs(tmpmount / "test");
  ofs << text;
  }
  