Gmane
From: Paul Johnson <paul <at> cogito.org.uk>
Subject: Ranged Sets 0.0.4
Newsgroups: gmane.comp.lang.haskell.general
Date: 2006-12-17 12:53:47 GMT (1 year, 48 weeks, 3 days, 10 hours and 7 minutes ago)
Ranged Sets now have a Monoid instance, and singletons (i.e. a range 
holding a single value).  Thanks to Jean-Philippe Bernardy for the patch.

Paul.