[GHC] #862: Document changes to packages

[GHC]

#862: Document changes to packages
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    Reporter:  simonmar                 |        Owner:             
        Type:  task                     |       Status:  new        
    Priority:  high                     |    Milestone:  6.6        
   Component:  Compiler (Type checker)  |      Version:  6.4.2      
    Severity:  normal                   |     Keywords:             
          Os:  Unknown                  |   Difficulty:  Easy (1 hr)
Architecture:  Unknown                  |  
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/862>
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