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

[GHC]

#10190: Add a Monad instance for ((,) w)
-------------------------------------+-------------------------------------
        Reporter:  fumieval          |                   Owner:  fumieval
            Type:  feature request   |                  Status:  patch
        Priority:  normal            |               Milestone:  7.12.1
       Component:  libraries/base    |                 Version:
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by hvr):

 * owner:   => fumieval
 * type:  bug => feature request
 * version:  7.8.4 =>
 * component:  Core Libraries => libraries/base
 * milestone:   => 7.12.1


Comment:

 Replying to [comment:1 fumieval]:

 Re your patch, the implementation LGTM, but the meta-information needs
 improvement:

  - missing a `libraries/base/changelog.md` entry
  - commit message needs to reference `#10190`
  - commit message should contain link(s) to the threads which proposed
 this addition (and passed)

 Please also consider using Phabricator, as then we also get validation via
 the build-bot that your patch doesn't need additional tweaks somewhere
 (e.g. in the testsuite)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10190#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler