[GHC] #9664: Add identity functor to base

[GHC]

#9664: Add identity functor to base
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        Reporter:  hvr               |                   Owner:  ekmett
            Type:  task              |                  Status:  closed
        Priority:  normal            |               Milestone:  7.10.1
       Component:  Core Libraries    |                 Version:
      Resolution:  fixed             |                Keywords:  report-
Operating System:  Unknown/Multiple  |  impact
 Type of failure:  None/Unknown      |            Architecture:
      Blocked By:                    |  Unknown/Multiple
 Related Tickets:                    |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:  Phab:D313
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Comment (by Herbert Valerio Riedel <hvr@…>):

 In [changeset:"1f60d635cee1ff3db72e0129f9035b147f52c9c4/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="1f60d635cee1ff3db72e0129f9035b147f52c9c4"
 {Data,Generic(1),MonadZip} instances for Identity

 These instances were missed when the identity functor was added to
 the `base` package (re #9664).

 Reviewed By: ekmett

 Differential Revision: https://phabricator.haskell.org/D674
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9664#comment:14>
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