patch applied (packages/base): document exception-overriding behaviour in withFile

[Simon Marlow]

Wed Jul 14 03:41:07 PDT 2010  Simon Marlow <marlowsd at gmail.com>
  * document exception-overriding behaviour in withFile

    M ./System/IO.hs -1 +3

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/base;a=darcs_commitdiff;h=20100714104107-12142-de37bc68b1d32b8aef5259b2b5771605a1ede75b.gz