[GHC] #13003: improve documentation for typed TH and make it more discoverable

[GHC]

#13003: improve documentation for typed TH and make it more discoverable
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        Reporter:  carter            |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Documentation     |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by carter):

 I'm not sure if this really needs library list discussion.

 as for the docs, yeah, i'll see about a teeny patch that perhaps makes it
 a clear subsection? or something. not sure, but its definitely hidden
 there.  Also its kinda an implementation detail/ quirk that they're under
 the same language flag too... it does make sense that theres some coercion
 functions between the underlying reps, but its quite odd that they're all
 under the same flag i think?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13003#comment:2>
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