Explain the purpose of update-branches

ibid · Nov 19, 2011 · e797f55 · e797f55
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diff --git a/contrib/update-branches.py b/contrib/update-branches.py
@@ -1,6 +1,11 @@
 #!/usr/bin/env python
 # Copyright (c) 2011, Stefano Rivera
 # Released under terms of the MIT/X/Expat Licence. See COPYING for details.
+#
+# This script keeps local checkouts of all branches currently involved in
+# merge-requests, or all active branches.
+# It should be run inside the root of a bzr repository, e.g.:
+# $ bzr init-repo ibid; cd ibid; update-branches -a
 
 import optparse
 import os