update the readme

29b18b9c · Betoule Marc · c46bf4a0 · 29b18b9c
Commit 29b18b9c authored Sep 08, 2010 by Betoule Marc
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README.org README.org +4 -1

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@@ -163,7 +163,10 @@ directive can be found the last one is retained.

 - #multiplex('gather') : The input set contains one tuple of all the ouputs.

- #multiplex('group') : compute the cross_product and group the task that are identical.
+- #multiplex('group') : compute the cross_product and group the task
+  that are identical. To make use of group, elements of the output set
+  have to be hashable.
+

 *** Depend directive