--- a/hgext/purge.py	Mon Sep 16 15:36:44 2024 +0200
+++ b/hgext/purge.py	Thu Sep 12 16:27:58 2024 -0400
@@ -36,4 +36,7 @@
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
 # be specifying the version(s) of Mercurial they are tested with, or
 # leave the attribute unspecified.
+
+from __future__ import annotations
+
 testedwith = b'ships-with-hg-core'