message: Generate better paths in TestFile on Windows
diff: @@ -64,10 +64,7 @@ TestFile::TestFile()
  {
  disable_sync_to_disk();
  m_temp_dir = util::make_temp_dir();
  - if (m_temp_dir.size() == 0 || m_temp_dir[m_temp_dir.size() - 1] != '/') {
  - m_temp_dir = m_temp_dir + "/";
  - }
  - path = fs::path(util::format("%1realm.XXXXXX", m_temp_dir)).string();
  + path = (fs::path(m_temp_dir) / "realm.XXXXXX").string();
  int fd = mkstemp(path.data());
  if (fd < 0) {
  int err = errno;
  