#14772: Remove CombinatorialClass from Permutations
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       Reporter:  tscrim            |         Owner:  sage-combinat
           Type:  enhancement       |        Status:  needs_review
       Priority:  major             |     Milestone:  sage-5.11
      Component:  combinatorics     |    Resolution:
       Keywords:  days49            |     Merged in:
        Authors:  Travis Scrimshaw  |     Reviewers:
Report Upstream:  N/A               |   Work issues:
         Branch:                    |  Dependencies:  #8386 #14519 #14808
       Stopgaps:                    |
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Comment (by darij):

 I'm going out for a walk, but here is a fix for the overly liberal check()
 method of multiset/set permutations. I have relegated the checking to
 {{{__contains__}}}; is that OK in terms of coding style?

 Note that I have not tested for speed regressions. I fear there might be
 some.

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Ticket URL: <http://trac.sagemath.org/ticket/14772#comment:45>
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