[GHC] #14199: Document Type.Reflection better (Fun and Con')

[GHC]

#14199: Document Type.Reflection better (Fun and Con')
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        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.2
       Component:  Core Libraries    |              Version:  8.2.1
      Resolution:                    |             Keywords:  Typeable
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3943,
       Wiki Page:                    |  Phab:D3991
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Comment (by bgamari):

 comment:4 merged to `ghc-8.2` as 14195b0982135668890f79b7790caf33c6147240.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14199#comment:10>
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