diff -r 55d132525155 -r 642e31cb55f0 mercurial/dirstatemap.py
--- a/mercurial/dirstatemap.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/mercurial/dirstatemap.py	Mon Feb 21 13:08:28 2022 -0700
@@ -34,7 +34,7 @@
 rangemask = 0x7FFFFFFF
 
 
-class _dirstatemapcommon(object):
+class _dirstatemapcommon:
     """
     Methods that are identical for both implementations of the dirstatemap
     class, with and without Rust extensions enabled.