[GHC] #10365: Implement Semigroup as a superclass of Monoid Proposal (Phase 1)

[GHC]

#10365: Implement Semigroup as a superclass of Monoid Proposal (Phase 1)
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        Reporter:  gidyn             |                Owner:  quchen
            Type:  feature request   |               Status:  patch
        Priority:  high              |            Milestone:  8.0.1
       Component:  libraries/base    |              Version:  7.10.1
      Resolution:                    |             Keywords:  report-impact
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1284
       Wiki Page:                    |
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Comment (by rwbarton):

 However, the real concern raised in #10365 is why Data.List.NonEmpty
 should be in base at all, causing extra work for GHC developers, and tying
 future fixes (once base is released) of this type to new versions of GHC,
 with no perceivable advantages.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10365#comment:30>
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