# HG changeset patch
# User Martin Geisler <mg@daimi.au.dk>
# Date 2008-09-17 08:24:30
# Node ID e3f9feb9ab7e828c205f02849e348cc97c20beb1
# Parent  bfad9865b1dc7059fc79d2f18370d5e2ae51ddd9

update: mention null revision in help text

diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -2789,7 +2789,8 @@ def update(ui, repo, node=None, rev=None
     """update working directory
 
     Update the working directory to the specified revision, or the
-    tip of the current branch if none is specified.
+    tip of the current branch if none is specified. Use null as
+    the revision to remove the working copy (like 'hg clone -U').
 
     If the requested revision is a descendant of the working
     directory, any outstanding changes in the working directory will