[GHC] #10735: Smooth out the differences between `compiler/utils/Pretty.hs` and `libraries/pretty`

[GHC]

#10735: Smooth out the differences between `compiler/utils/Pretty.hs` and
`libraries/pretty`
-------------------------------------+-------------------------------------
        Reporter:  thomie            |                Owner:  thomie
            Type:  task              |               Status:  patch
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #1062, #1176,     |  Differential Rev(s):  Phab:D1130,
  #7666, #8809                       |  Phab:D1132
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * milestone:  8.0.1 => 8.2.1


Comment:

 It seems unlikely that this is going to happen for 8.0. Punting to 8.2.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10735#comment:22>
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