[GHC] #11210: Missing instances for Identity and Const

[GHC]

#11210: Missing instances for Identity and Const
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        Reporter:  duairc            |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries/base    |              Version:  7.11
      Resolution:                    |             Keywords:  g
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 ekmett):

 I have no complaints about adding them.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11210#comment:2>
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