[GHC] #9392: "\n" is displayed weirdly in error messages

[GHC]

#9392: "\n" is displayed weirdly in error messages
-------------------------------------+-------------------------------------
        Reporter:  Artyom.Kazak      |                   Owner:
            Type:  feature request   |                  Status:  new
        Priority:  low               |               Milestone:
       Component:  Compiler          |                 Version:  7.8.3
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Other             |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:  #9681             |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by thomie):

 * keywords:  newcomer =>
 * type:  bug => feature request


Comment:

 @Artyom.Kazak: what exactly do you find weird about the current error
 message? The printing over multiple lines, or just the extra slashes that
 are added. Perhaps the following would be an improvement:
 {{{
 In the expression:
       "a\n
       b"
       + ()
 }}}

 Replying to [comment:4 rwbarton]:
 > The formatting is intentional, see #4436. It would be nice to use the
 original syntax, though (and set the "original syntax" of a quasiquoter to
 use the multiline thing).

 To show the exception from #4436, the following code path is used:

  `TcSplice.runMeta -> Outputable.ppr -> (instance Outputable HsLit) ->
 Outputable.pprHsString -> GHC.Show.showMultiLineString`

 I don't see an easy way to make the change you propose.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9392#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler