[GHC] #9618: Undocument ImpredicativeTypes

[GHC]

#9618: Undocument ImpredicativeTypes
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        Reporter:  dfeuer            |                   Owner:
            Type:  bug               |                  Status:  closed
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Documentation     |                 Version:  7.8.3
      Resolution:  duplicate         |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #8808             |  Differential Revisions:
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Changes (by thomie):

 * status:  new => closed
 * resolution:   => duplicate


Comment:

 In #10325, SPJ updated the User's guide and the error message: "GHC
 doesn't yet support impredicative polymorphism".

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9618#comment:5>
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