patch applied (packages/base): Add mfilter to Control.Monad

[Ian Lynagh]

Thu Sep 17 07:56:16 PDT 2009  jon.fairbairn at cl.cam.ac.uk
  * Add mfilter to Control.Monad
  
  Straightforward MonadPlus version of List.filter. I would
  prefer to call it filter, but the current naming scheme for
  Control.Monad implies mfilter.
  

    M ./Control/Monad.hs +15

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/base;a=darcs_commitdiff;h=20090917145616-932e1-eb14bd94160de2c10f15bb525624808105d149d6.gz