[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:  igloo                                           
      Type:  feature request    |         Status:  new                                             
  Priority:  normal             |      Milestone:  7.8.1                                           
 Component:  Compiler (Parser)  |        Version:  6.10.4                                          
Resolution:                     |       Keywords:  language pragma extensions error message warning
        Os:  Unknown/Multiple   |   Architecture:  Unknown/Multiple                                
   Failure:  None/Unknown       |     Difficulty:  Unknown                                         
  Testcase:                     |      Blockedby:                                                  
  Blocking:                     |        Related:                                                  
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Changes (by igloo):

  * milestone:  7.6.2 => 7.8.1


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3647#comment:17>
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