[GHC] #9681: Printing of "\n" in error messages is broken

[GHC]

#9681: Printing of "\n" in error messages is broken
-------------------------------------+-------------------------------------
              Reporter:  oerjan      |            Owner:
                  Type:  bug         |           Status:  infoneeded
              Priority:  high        |        Milestone:  7.10.1
             Component:  Compiler    |          Version:  7.8.3
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:  1+"\n"      |
              Blocking:              |
Differential Revisions:  Phab:D405   |
-------------------------------------+-------------------------------------
Changes (by mlen):

 * cc: simonpj (added)
 * status:  new => infoneeded
 * differential:   => Phab:D405


Comment:

 The patch is available @ Phab:D405

 It covers only the case of missing newline, since I didn't know what to do
 about the formatting issue.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9681#comment:3>
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