--- a/mercurial/commandserver.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/mercurial/commandserver.py	Mon Feb 21 13:08:28 2022 -0700
@@ -39,7 +39,7 @@
 )
 
 
-class channeledoutput(object):
+class channeledoutput:
     """
     Write data to out in the following format:
 
@@ -68,7 +68,7 @@
         return getattr(self.out, attr)
 
 
-class channeledmessage(object):
+class channeledmessage:
     """
     Write encoded message and metadata to out in the following format:
 
@@ -97,7 +97,7 @@
         return getattr(self._cout, attr)
 
 
-class channeledinput(object):
+class channeledinput:
     """
     Read data from in_.
 
@@ -200,7 +200,7 @@
     )
 
 
-class server(object):
+class server:
     """
     Listens for commands on fin, runs them and writes the output on a channel
     based stream to fout.
@@ -450,7 +450,7 @@
         u.setlogger(b'cmdserver', logger)
 
 
-class pipeservice(object):
+class pipeservice:
     def __init__(self, ui, repo, opts):
         self.ui = ui
         self.repo = repo
@@ -525,7 +525,7 @@
                 raise
 
 
-class unixservicehandler(object):
+class unixservicehandler:
     """Set of pluggable operations for unix-mode services
 
     Almost all methods except for createcmdserver() are called in the main
@@ -559,7 +559,7 @@
         return server(self.ui, repo, fin, fout, prereposetups)
 
 
-class unixforkingservice(object):
+class unixforkingservice:
     """
     Listens on unix domain socket and forks server per connection
     """