[Haskell-cafe] Wiki page for rewrite rules tips, types and tricks

[Donald Bruce Stewart]

After suggesting solutions based on rewrite rules to three different
questions this week, I though maybe we better have a wiki page on using
rewrite rules for non-traditional ad-hoc tricks.

    http://haskell.org/haskellwiki/Playing_by_the_rules

If you've used rewrite rules for something fun (other than implementing
a major deforestation system), please add it to the page.

-- Don