[GHC] #7963: -ddump-minimal-imports should preserve "hiding" imports

[GHC]

#7963: -ddump-minimal-imports should preserve "hiding" imports
-----------------------------+----------------------------------------------
Reporter:  dsf               |          Owner:                  
    Type:  bug               |         Status:  new             
Priority:  normal            |      Component:  Compiler        
 Version:  7.6.2             |       Keywords:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
 Failure:  None/Unknown      |      Blockedby:                  
Blocking:                    |        Related:                  
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 An input file like

 {{{
 {-# LANGUAGE OverloadedStrings #-}
 module Hiding where

 import Prelude hiding (writeFile, unlines)
 import Data.Text (unlines)
 import Data.Text.IO (writeFile)

 main :: IO ()
 main = writeFile "/tmp/foo" (unlines ["hello", "world"])
 }}}

 compiled with -ddump-minimal-imports produces a .imports file containing

 {{{
 import Data.Text ( unlines )
 import Data.Text.IO ( writeFile )
 }}}

 Without the import of Prelude the original file won't compile with the new
 imports.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7963>
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