[GHC] #2204: Improve 'patterns not matched' warnings

[GHC]

#2204: Improve 'patterns not matched' warnings
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    Reporter:  Deewiant          |        Owner:              
        Type:  feature request   |       Status:  new         
    Priority:  low               |    Milestone:  _|_         
   Component:  Compiler          |      Version:  6.8.2       
    Keywords:                    |   Difficulty:  Unknown     
          Os:  Unknown/Multiple  |     Testcase:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Changes (by marcotmarcot):

 * cc: marcot@… (added)
  * failure:  => None/Unknown


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2204#comment:5>
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