[GHC] #15790: String literals are not escaped in -ddump-splices

[GHC]

#15790: String literals are not escaped in -ddump-splices
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           Reporter:  michalrus      |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.6.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 For example, with this code:

 `Main.hs`:
 {{{#!hs
 {-# LANGUAGE TemplateHaskell #-}
 {-# OPTIONS_GHC -ddump-splices -ddump-to-file #-}

 module Main where

 main :: IO ()
 main = do
   putStrLn $( [| "\n\n\n" |] )
   putStrLn $( [| "\"" |] )
 }}}

 This is output:

 `Main.dump-splices`:
 {{{
 Main.hs:8:15-28: Splicing expression [| "\n\n\n" |] ======> "


 "
 Main.hs:9:15-24: Splicing expression [| "\"" |] ======> """
 }}}

 … which is not valid Haskell.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15790>
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