--- a/mercurial/fancyopts.py	Sun Jan 05 22:12:02 2025 -0500
+++ b/mercurial/fancyopts.py	Sun Jan 05 22:23:31 2025 -0500
@@ -241,7 +241,7 @@
 class _callableopt(customopt):
     def __init__(self, callablefn):
         self.callablefn = callablefn
-        super(_callableopt, self).__init__(None)
+        super().__init__(None)
 
     def newstate(self, oldstate, newparam, abort):
         return self.callablefn(newparam)