[GHC] #3911: HughesPJ.vcat should behave like 'foldr ($$) empty', not like 'foldr ($+$) empty'

[GHC]

#3911: HughesPJ.vcat should behave like 'foldr ($$) empty', not like 'foldr ($+$)
empty'
---------------------------------+------------------------------------------
    Reporter:  benedikt          |        Owner:  igloo                      
        Type:  bug               |       Status:  patch                      
    Priority:  high              |    Milestone:  6.14.1                     
   Component:  libraries/pretty  |      Version:  6.12.1                     
    Keywords:                    |   Difficulty:                             
          Os:  Unknown/Multiple  |     Testcase:                             
Architecture:  Unknown/Multiple  |      Failure:  Incorrect result at runtime
---------------------------------+------------------------------------------
Changes (by igloo):

  * owner:  => igloo


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3911#comment:2>
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