fix: properly clean up after running setup_root_logging in test_log (c…

…anonical#1259)

Calling `setup_root_logging` changes `sys.excepthook`. The tests should
undo this in the same way that they clear out the logging handlers that
`setup_root_logging` adds.

test/test_log.py

@@ -15,6 +15,7 @@
 import io
 import logging
 import re
+import sys
 import typing
 import unittest
 from unittest.mock import patch
@@ -50,6 +51,7 @@ def logger():
     logger = logging.getLogger()
     yield logger
     logging.getLogger().handlers.clear()
+    sys.excepthook = sys.__excepthook__
 
 
 class TestLogging: