[GHC] #11650: Documentation does not mention that default definitions for Alternative(some, many) can easily blow up

[GHC]

#11650: Documentation does not mention that default definitions for
Alternative(some, many) can easily blow up
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        Reporter:  bgamari           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Documentation     |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 RyanGlScott, I've committed the patch in comment:9 as a stop-gap measure;
 I hope you'll have a chance to add the instance mentioned in comment:7 and
 when you do so fix `U1` to your liking.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11650#comment:10>
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