[GHC] #10168: generalize filterM, mapAndUnzipM, zipWithM, zipWithM_, replicateM, replicateM_

[GHC]

#10168: generalize filterM, mapAndUnzipM, zipWithM, zipWithM_, replicateM,
replicateM_
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        Reporter:  strake888         |                   Owner:
            Type:  bug               |                  Status:  patch
        Priority:  normal            |               Milestone:  8.0.1
       Component:  Core Libraries    |                 Version:  7.10.1-rc1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Changes (by dfeuer):

 * cc: ekmett (added)


Comment:

 It might be nice to take the opportunity to define `replicateM` directly,
 rather than doing so in terms of `sequenceA` and `replicate`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10168#comment:7>
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