[GHC] #9754: Fix Applicative instances in the wake of AMP

[GHC]

#9754: Fix Applicative instances in the wake of AMP
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       Reporter:  dfeuer             |                   Owner:  dfeuer
           Type:  task               |                  Status:  new
       Priority:  normal             |               Milestone:  7.10.1
      Component:  Core Libraries     |                 Version:  7.8.3
       Keywords:  AMP                |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Unknown            |         Type of failure:  Other
     Blocked By:                     |               Test Case:
Related Tickets:                     |                Blocking:
                                     |  Differential Revisions:
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 I haven't tracked down all the problems yet, but several experiments
 leading to validation failures strongly suggest that some `Applicative`
 instances in the GHC tree fail to interact properly with their associated
 `Monad` instances. That is, `ap ≠ (<*>)` and/or `(>>) ≠ (*>)`. We should
 be able to fix these up by fleshing out the appropriate instance
 declarations.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9754>
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