--- a/hgext/extdiff.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/hgext/extdiff.py	Mon Feb 21 13:08:28 2022 -0700
@@ -695,7 +695,7 @@
     return dodiff(ui, repo, cmdline, pats, opts)
 
 
-class savedcmd(object):
+class savedcmd:
     """use external program to diff repository (or selected files)
 
     Show differences between revisions for the specified files, using