patch applied (packages/base): Use let !y = x in .. x .. instead of seq in $! and evaluate (#2273)

[Simon Marlow]

Wed Sep 16 07:04:54 PDT 2009  Simon Marlow <marlowsd at gmail.com>
  * Use let !y = x in .. x .. instead of seq in $! and evaluate (#2273)

    M ./GHC/IO.hs -5 +2
    M ./Prelude.hs -1 +5

View patch online:
http://darcs.haskell.org/packages/base/_darcs/patches/20090916140454-12142-d2b9048d4a5f6b09a0c2cdcfad044fb3b88eeaa2.gz