diff -r 55d132525155 -r 642e31cb55f0 mercurial/subrepo.py
--- a/mercurial/subrepo.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/mercurial/subrepo.py	Mon Feb 21 13:08:28 2022 -0700
@@ -220,7 +220,7 @@
 # subrepo classes need to implement the following abstract class:
 
 
-class abstractsubrepo(object):
+class abstractsubrepo:
     def __init__(self, ctx, path):
         """Initialize abstractsubrepo part