--- a/mercurial/manifest.py	Sat Aug 03 01:33:13 2024 -0400
+++ b/mercurial/manifest.py	Wed Sep 18 17:46:46 2024 -0400
@@ -1793,7 +1793,7 @@
     def fulltextcache(self):
         return self._fulltextcache
 
-    def clearcaches(self, clear_persisted_data=False):
+    def clearcaches(self, clear_persisted_data: bool = False) -> None:
         self._revlog.clearcaches()
         self._fulltextcache.clear(clear_persisted_data=clear_persisted_data)
         self._dirlogcache = {self.tree: self}