--- a/mercurial/graphmod.py Mon Feb 21 13:03:43 2022 -0700
+++ b/mercurial/graphmod.py Mon Feb 21 13:08:28 2022 -0700
@@ -358,7 +358,7 @@
@attr.s
-class asciistate(object):
+class asciistate:
"""State of ascii() graph rendering"""
seen = attr.ib(init=False, default=attr.Factory(list))