[GHC] #9759: Add Alternative wrapper to Data.Monoid

[GHC]

#9759: Add Alternative wrapper to Data.Monoid
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              Reporter:  dfeuer      |            Owner:  dfeuer
                  Type:  task        |           Status:  patch
              Priority:  normal      |        Milestone:  7.10.1
             Component:  Core        |          Version:  7.9
  Libraries                          |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Easy (less than 1
  Unknown/Multiple                   |  hour)
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D422   |
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Comment (by Herbert Valerio Riedel <hvr@…>):

 In [changeset:"49fde3b6764d4b7bb149ef1c2c56d00cf0878ddb/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="49fde3b6764d4b7bb149ef1c2c56d00cf0878ddb"
 Add `Alternative` wrapper to Data.Monoid

 Complete #9759. Use `coerce` to get nicer definitions of `Sum` and
 `Product`; update documentation for `First` and `Last`.

 Reviewed By: hvr

 Differential Revision: https://phabricator.haskell.org/D422
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9759#comment:3>
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