[GHC] #3647: unify handling and error messages for -X vs. {-#LANGUAGE ...#-} pragmas/extensions

[GHC]

#3647: unify handling and error messages for -X vs. {-#LANGUAGE ...#-}
pragmas/extensions
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        Reporter:  eflister          |            Owner:
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Compiler          |          Version:  6.10.4
  (Parser)                           |         Keywords:  language pragma
      Resolution:                    |  extensions error message warning
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by nomeata):

 I have a patch for this at https://github.com/nomeata/ghc/compare/T3647
 and https://github.com/nomeata/ghc-testsuite/compare/T3647 and will merge
 them soon (today or tomorrow) unless someone shouts violently.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3647#comment:20>
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