diff -r 96379c93ba6f -r 1c4e4004f3a6 mercurial/revlog.py
--- a/mercurial/revlog.py	Wed Sep 09 11:12:36 2009 +0200
+++ b/mercurial/revlog.py	Tue Sep 08 17:58:59 2009 -0400
@@ -1128,7 +1128,8 @@
         return self.node(c)
 
     def group(self, nodelist, lookup, infocollect=None):
-        """calculate a delta group
+        """Calculate a delta group, yielding a sequence of changegroup chunks
+        (strings).
 
         Given a list of changeset revs, return a set of deltas and
         metadata corresponding to nodes. the first delta is