patch applied (packages/base): 'permutations' is now more lazy and also faster

[Ian Lynagh]

Wed Jan  2 15:17:12 PST 2008  Twan van Laarhoven <twanvl at gmail.com>
  * 'permutations' is now more lazy and also faster

    M ./Data/List.hs -6 +9

View patch online:
http://darcs.haskell.org/packages/base/_darcs/patches/20080102231712-e23c7-9fae64355b12e799e59094e18deb9a1f67a47215.gz