[GHC] #13593: Unexpected behavior from Data.List.groupBy

[GHC]

#13593: Unexpected behavior from Data.List.groupBy
-------------------------------------+-------------------------------------
        Reporter:  dsf               |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 Indeed, we should absolutely update the documentation to reflect this.
 I'll add a variant of the language in comment:8 to the Haddocks.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13593#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler