[GHC] #10050: template haskell Ppr missing parentheses for SigT

[GHC]

#10050: template haskell Ppr missing parentheses for SigT
-------------------------------------+-------------------------------------
              Reporter:  aavogt      |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Compiler    |           Version:  7.8.4
              Keywords:              |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  None/Unknown
  Unknown/Multiple                   |        Blocked By:
             Test Case:              |   Related Tickets:
              Blocking:              |
Differential Revisions:              |
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 {{{#!hs
 ppr (SigE (VarE (mkName "a")) (SigT (VarT (mkName "x")) (VarT (mkName
 "k"))))
 }}}
 prints as "a :: x :: k". Ghc can't parse that, so I think it should be
 printed as "a :: (x :: k)"

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10050>
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