--- a/mercurial/worker.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/mercurial/worker.py	Mon Feb 21 13:08:28 2022 -0700
@@ -68,7 +68,7 @@
     return threading.current_thread() == threading.main_thread()
 
 
-class _blockingreader(object):
+class _blockingreader:
     def __init__(self, wrapped):
         self._wrapped = wrapped