[GHC] #3544: Add instance IsString ShowS where fromString = showString

[GHC]

#3544: Add instance IsString ShowS where fromString = showString
------------------------------+---------------------------------------------
 Reporter:  basvandijk        |          Owner:                  
     Type:  proposal          |         Status:  closed          
 Priority:  normal            |      Milestone:                  
Component:  libraries/base    |        Version:  6.10.4          
 Severity:  normal            |     Resolution:  wontfix         
 Keywords:                    |       Testcase:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
------------------------------+---------------------------------------------
Changes (by basvandijk):

  * status:  new => closed
  * resolution:  => wontfix

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3544#comment:2>
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