diff -r 55d132525155 -r 642e31cb55f0 mercurial/ancestor.py
--- a/mercurial/ancestor.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/mercurial/ancestor.py	Mon Feb 21 13:08:28 2022 -0700
@@ -146,7 +146,7 @@
     return deepest(gca)
 
 
-class incrementalmissingancestors(object):
+class incrementalmissingancestors:
     """persistent state used to calculate missing ancestors incrementally
 
     Although similar in spirit to lazyancestors below, this is a separate class
@@ -316,7 +316,7 @@
             see(p2)
 
 
-class lazyancestors(object):
+class lazyancestors:
     def __init__(self, pfunc, revs, stoprev=0, inclusive=False):
         """Create a new object generating ancestors for the given revs. Does
         not generate revs lower than stoprev.