[GHC] #10325: Clearify status of ImpredicativeTypes Extension

[GHC]

#10325: Clearify status of ImpredicativeTypes Extension
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        Reporter:  j80JjBjVNRMajmA   |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Documentation     |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:  #9618, #10281     |                Blocking:
                                     |  Differential Revisions:
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Changes (by rwbarton):

 * related:   => #9618, #10281


Comment:

 I agree with j80JjBjVNRMajmA, and see also #9618. Meanwhile #10281 is in
 part about expanding the documentation of ImpredicativeTypes slightly.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10325#comment:1>
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