patch applied (packages/base): avoid `mappend` in monoid laws, because it doesn't work with haddock

[Ross Paterson]

Sat Jan 17 17:15:08 PST 2009  Ross Paterson <ross at soi.city.ac.uk>
  * avoid `mappend` in monoid laws, because it doesn't work with haddock

    M ./Data/Monoid.hs -3 +3

View patch online:
http://darcs.haskell.org/packages/base/_darcs/patches/20090118011508-b47d3-08216a6ea78dbf8939d13e93c0655164e19ceda2.gz