mercurial/registrar.py

--- a/mercurial/registrar.py	Sat Aug 04 17:17:31 2018 +0900
+++ b/mercurial/registrar.py	Sat Aug 04 17:08:33 2018 +0900
@@ -249,6 +249,7 @@
 
     Optional argument 'weight' indicates the estimated run-time cost, useful
     for static optimization, default is 1. Higher weight means more expensive.
+    There are predefined weights in the 'filesetlang' module.
 
     ====== =============================================================
     Weight Description and examples