[GHC] #11660: Remove Type pretty-printer in favor of IfaceType

[GHC]

#11660: Remove Type pretty-printer in favor of IfaceType
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        Reporter:  bgamari           |                Owner:
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 I'm sure we can deal with that.  Eg in `TyCoRep` put just
 {{{
 instance Outputable Type where
   ppr = pprType
 }}}
 and then yes `{-# SOURCE #-}` import `IfaceType` which defines `pprType`
 and others. Import `IfactType` into `Type` and re-export the pretty-
 printing functions.

 But before worrying much let's check that it works at all!

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11660#comment:4>
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