diff -r 05a62e8ddf3d -r e37fa751182a mercurial/commands.py
--- a/mercurial/commands.py	Fri Jul 25 13:23:59 2008 +0200
+++ b/mercurial/commands.py	Fri Jul 25 13:26:16 2008 +0200
@@ -2781,6 +2781,8 @@
     If the requested revision is on a different named branch and the
     working directory is clean, update quietly switches branches.
 
+    If you want to update just one file to an older revision, use revert.
+
     See 'hg help dates' for a list of formats valid for --date.
     """
     if rev and node: