[GHC] #8815: confusing language in error message

[GHC]

#8815: confusing language in error message
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        Reporter:  carter            |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.8.1-rc1
      Resolution:                    |         Keywords:
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 goldfire):

 See very relevant discussion in #3647. It was decided that removing the
 `-X` from error messages made copy-and-paste into `LANGUAGE` pragmas
 easier. Perhaps surrounding extensions in error messages with quotes would
 be a happy medium?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8815#comment:2>
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