--- a/mercurial/copies.py Sat Oct 01 20:20:11 2016 +0900
+++ b/mercurial/copies.py Mon Oct 03 16:19:55 2016 +0200
@@ -465,6 +465,11 @@
diverge = record all diverges in this dict
copy = record all non-divergent copies in this dict
fullcopy = record all copies in this dict
+
+ note: limit is only an optimization, and there is no guarantee that
+ irrelevant revisions will not be limited
+ there is no easy way to make this algorithm stop in a guaranteed way
+ once it "goes behind a certain revision".
"""
ma = ca.manifest()