[GHC] #11743: Add unicode support for TH quotes (`[| |]`)

[GHC]

#11743: Add unicode support for TH quotes (`[| |]`)
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        Reporter:  JoshPrice247      |                Owner:  JoshPrice247
            Type:  feature request   |               Status:  patch
        Priority:  low               |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.10.3
  (Parser)                           |             Keywords:  unicode,
      Resolution:                    |  UnicodeSyntax
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #2878, #10162     |  Differential Rev(s):  Phab:D2185
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"8f7d01632cd79957fe42ea37103ca9b91a1c54f5/ghc"
 8f7d0163/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="8f7d01632cd79957fe42ea37103ca9b91a1c54f5"
 Add support for unicode TH quotes (#11743)

 I've also added cases for `IToparenbar` and `ITcparenbar` (aka banana
 brackets) to `isUnicode`.

 Document unicode TH quote alternatives (#11743)

 Test Plan: ./validate

 Reviewers: austin, goldfire, bgamari

 Reviewed By: bgamari

 Subscribers: thomie, mpickering

 Differential Revision: https://phabricator.haskell.org/D2185

 GHC Trac Issues: #11743
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11743#comment:6>
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