[GHC] #11603: Fix/clarify documentation in GHC.Stats

[GHC]

#11603: Fix/clarify documentation in GHC.Stats
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        Reporter:  dcturner          |                Owner:
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1929
       Wiki Page:                    |
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Changes (by dcturner):

 * differential:   => Phab:D1929


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11603#comment:1>
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