diff -r fbfb1d6d8459 -r eed3e2b79b48 mercurial/store.py
--- a/mercurial/store.py	Tue Apr 06 13:49:19 2021 -0400
+++ b/mercurial/store.py	Tue Apr 06 10:37:47 2021 +0200
@@ -452,7 +452,9 @@
         return reversed(self._walk(b'', False))
 
     def walk(self, matcher=None):
-        """yields (unencoded, encoded, size)
+        """return file related to data storage (ie: revlogs)
+
+        yields (unencoded, encoded, size)
 
         if a matcher is passed, storage files of only those tracked paths
         are passed with matches the matcher