[GHC] #10190: Add a Monad instance for ((,) w)

[GHC]

#10190: Add a Monad instance for ((,) w)
-------------------------------------+-------------------------------------
        Reporter:  fumieval          |                   Owner:
            Type:  bug               |                  Status:  patch
        Priority:  normal            |               Milestone:
       Component:  Core Libraries    |                 Version:  7.8.4
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by snoyberg):

 I have no objection to this change.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10190#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler