message: construction: fixed test cases
diff: @@ -100,7 +100,6 @@ void check_utf8dump(bool success_expected, int byte1, int byte2 = -1, int byte3
  // check that replace string contains a replacement character
  CHECK(s_replaced.find("\xEF\xBF\xBD") != std::string::npos);
  -
  }
  // check that prefix and suffix are preserved
  