--- a/mercurial/fancyopts.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/mercurial/fancyopts.py	Mon Feb 21 13:08:28 2022 -0700
@@ -204,7 +204,7 @@
     return parsedopts, parsedargs
 
 
-class customopt(object):  # pytype: disable=ignored-metaclass
+class customopt:  # pytype: disable=ignored-metaclass
     """Manage defaults and mutations for any type of opt."""
 
     __metaclass__ = abc.ABCMeta