[GHC] #13628: Confusing error message with TypeApplications already enabled

[GHC]

#13628: Confusing error message with TypeApplications already enabled
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           Reporter:  nh2            |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.2
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Poor/confusing
  Unknown/Multiple                   |  error message
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 I have `{-# LANGUAGE TypeApplications #-}` in my file, and accidentally
 wrote a typo: `myFunction at a` (missing space, intended was `myFunction
 @a`).

 GHC 8.0.2 outputs:

 {{{
     Pattern syntax in expression context: myFunction at a
     Did you mean to enable TypeApplications?
 }}}

 I already have TypeApplications on, why does GHC suggest this?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13628>
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