[GHC] #9610: Missing fixity declaration for `Data.Foldable.{elem, notElem}`

[GHC]

#9610: Missing fixity declaration for `Data.Foldable.{elem,notElem}`
-------------------------------------+-------------------------------------
       Reporter:  hvr                |                   Owner:
           Type:  bug                |                  Status:  new
       Priority:  normal             |               Milestone:  7.10.1
      Component:  libraries/base     |                 Version:  7.8.3
       Keywords:                     |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Unknown            |         Type of failure:
     Blocked By:                     |  None/Unknown
Related Tickets:  #9586              |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
 `Data.Foldable.{elem,notElem}` is lacking the fixity declaration

 {{{#!hs
 infix  4 `elem`, `notElem`
 }}}

 to match their monomorphic `Data.List` counterparts' fixity.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9610>
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