patch applied (cabal): Add improved xargs style function

Sun Jun 7 11:02:14 PDT 2009 Duncan Coutts * Add improved xargs style function More flexible and based on the ProgramInvocation stuff M ./Distribution/Simple/Program/Run.hs -2 +78 View patch online: http://darcs.haskell.org/cabal/_darcs/patches/20090607180214-adfee-1dfa2fd44...