[GHC] #11188: Confusing "parse error in pattern" for spurious indentation.

[GHC]

#11188: Confusing "parse error in pattern" for spurious indentation.
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        Reporter:  andreas.abel      |                Owner:
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  7.10.1
  (Parser)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by thomie):

 The suggestion `Possibly caused by a missing 'do'` was added in #984.
 [ticket:984#comment:9 comment 9] in that ticket says:

     "Only time will tell whether this causes more confusion (in cases
 where the suggestion is wrong) than it resolves."

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11188#comment:3>
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