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

[GHC]

#3999: Improved folds for Data.Map and Data.IntMap
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    Reporter:  LouisWasserman     |        Owner:              
        Type:  proposal           |       Status:  new         
    Priority:  normal             |    Milestone:  Not GHC     
   Component:  libraries (other)  |      Version:  6.12.1      
    Keywords:                     |   Difficulty:              
          Os:  Unknown/Multiple   |     Testcase:              
Architecture:  Unknown/Multiple   |      Failure:  None/Unknown
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Changes (by kfrdbs):

 * cc: kfrdbs@… (added)


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3999#comment:5>
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