[GHC] #14819: GHC 8.2 does not accept British {-# LANGUAGE GeneralisedNewtypeDeriving #-} spelling

[GHC]

#14819: GHC 8.2 does not accept British {-# LANGUAGE GeneralisedNewtypeDeriving #-}
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        Reporter:  clinton           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  lowest            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by osa1):

 Happens in HEAD too.

 Looking at `DynFlags` at the time when `-XGeneralisedNewtypeDeriving`
 added, I think this version of the flag was never supported.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14819#comment:1>
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