[GHC] #10847: :info should print minimal definition

[GHC]

#10847: :info should print minimal definition
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        Reporter:  osa1              |                   Owner:
            Type:  feature request   |                  Status:  new
        Priority:  lowest            |               Milestone:
       Component:  GHCi              |                 Version:  7.11
      Resolution:                    |                Keywords:  newcomer
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by simonpj):

 I think that would be good.  Can anyone offer a patch?  Just a minor
 modification to the code that prints the definition in response to
 `:info`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10847#comment:2>
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