diff -r 6c3798b4597f -r ccddd2f54013 mercurial/revlog.py
--- a/mercurial/revlog.py	Tue Sep 19 23:14:01 2023 +0200
+++ b/mercurial/revlog.py	Tue Sep 19 23:14:36 2023 +0200
@@ -941,6 +941,7 @@
                 self.index.update_nodemap_data(*nodemap_data)
 
     def rev(self, node):
+        """return the revision number associated with a <nodeid>"""
         try:
             return self.index.rev(node)
         except TypeError: