[Haddock] [haddock] #205: Prune is not regarded for DEPRECATED things

[haddock]

#205: Prune is not regarded for DEPRECATED things
------------------------+---------------------------------------------------
Reporter:  SimonHengel  |       Owner:        
    Type:  defect       |      Status:  new   
Priority:  major        |   Milestone:  2.10.0
 Version:  2.9.4        |    Keywords:        
------------------------+---------------------------------------------------
 (only the current {{{ghc-7.4}}} branch is affected)

 Steps to reproduce:
 {{{
 {-# OPTIONS_HADDOCK prune #-}
 module PruneWithWarning (foo, bar) where

 foo :: Int
 foo = 23
 {-# DEPRECATED foo "use bar instead" #-}

 bar :: Int
 bar = 42
 }}}
 {{{
 $ haddock -h PruneWithWarning.hs
 }}}

 Expected result: The generated documentation contains nothing.

 Actual result: The generated documentation contains {{{foo}}}, together
 with a deprecation message.

-- 
Ticket URL: <http://trac.haskell.org/haddock/ticket/205>
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