[stdlib] Use Union syntax for Python 3.9 compatibility in test

Author: rgant

stdlib/@tests/test_cases/check_logging.py

@@ -5,7 +5,7 @@
 import logging.handlers
 import multiprocessing
 import queue
-from typing import Any
+from typing import Any, Union
 from typing_extensions import assert_type
 
 # This pattern comes from the logging docs, and should therefore pass a type checker
@@ -33,4 +33,4 @@ def record_factory(*args: Any, **kwargs: Any) -> logging.LogRecord:
 
 # FileHandler.stream can be None when delay=True or after close()
 fh = logging.FileHandler("test.log", delay=True)
-assert_type(fh.stream, io.TextIOWrapper | None)
+assert_type(fh.stream, Union[io.TextIOWrapper, None])