[GHC] #3999: Improved folds for Data.Map and Data.IntMap (was: Improved folds for Data.Map)

[GHC]

#3999: Improved folds for Data.Map and Data.IntMap
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    Reporter:  LouisWasserman    |       Owner:                   
        Type:  proposal          |      Status:  new              
    Priority:  normal            |   Component:  libraries (other)
     Version:  6.12.1            |    Keywords:                   
          Os:  Unknown/Multiple  |    Testcase:                   
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown     
       Patch:  1                 |  
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3999#comment:2>
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