[GHC] #10645: Fix Data.List.sortOn documentation

[GHC]

#10645: Fix Data.List.sortOn documentation
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        Reporter:  spl               |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  libraries/base    |                 Version:  7.10.2-rc2
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by spl):

 I would submit a patch myself, but it will take me time to set everything
 up and it's such a small change, I'm hoping it's easy enough for somebody
 else to do it. If not, let me know, and I'll do it.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10645#comment:1>
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