[GHC] #4201: Improve eta reduction

[GHC]

#4201: Improve eta reduction
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    Reporter:  simonpj           |        Owner:              
        Type:  bug               |       Status:  new         
    Priority:  normal            |    Milestone:              
   Component:  Compiler          |      Version:  6.12.3      
    Keywords:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Testcase:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Comment(by LouisWasserman):

 I actually wrote a patch for this, will upload it when I get in this
 morning (yay, my first GHC patch!)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4201#comment:2>
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