--- a/mercurial/obsolete.py	Mon Sep 16 15:36:38 2024 +0200
+++ b/mercurial/obsolete.py	Mon Sep 16 15:36:44 2024 +0200
@@ -68,6 +68,8 @@
 
 """
 
+from __future__ import annotations
+
 import binascii
 import struct
 import weakref