[GHC] #13791: Document allowed syntax in WARNING and DEPRECATED pragmas

[GHC]

#13791: Document allowed syntax in WARNING and DEPRECATED pragmas
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        Reporter:  phischu           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  lowest            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"8f72608953fee7ff77a6d89b00f25749261b8820/ghc" 8f72608/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="8f72608953fee7ff77a6d89b00f25749261b8820"
 users-guide: Document multi-line DEPRECATED pragmas

 Fixes #13791.

 [skip ci]

 Test Plan: Read it

 Reviewers: austin

 Subscribers: rwbarton, thomie

 GHC Trac Issues: #13791

 Differential Revision: https://phabricator.haskell.org/D3639
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13791#comment:1>
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