[GHC] #13087: AlternativeLayoutRule breaks LambdaCase

[GHC]

#13087: AlternativeLayoutRule breaks LambdaCase
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        Reporter:  ohhellojoe        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
  (Parser)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by ohhellojoe):

 I found the flag via --supported-extensions.  I was looking for a layout-
 related extension that would allow me to forgo indentation of a do block
 that is the last statement of another do block.  It did the trick.  Maybe
 there was a better, more commonly used extension that would have served.

 {{{#!hs
 foobar :: IO (Maybe ())
 foobar = do putStrLn "doing stuff in IO monad"
             return $ do
             Just () -- not indented.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13087#comment:2>
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