[GHC] #10145: :info (->) should list its fixity

[GHC]

#10145: :info (->) should list its fixity
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              Reporter:  oerjan      |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  low         |         Milestone:
             Component:  GHCi        |           Version:  7.8.3
              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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 The GHC manual states:

 > * Function arrow is `infixr` with fixity 0. (This might change; I'm not
 sure what it should be.)

 Since this isn't the default `infixl 9`, it should be listed when you do
 `:info (->)`, but currently (at least in 7.8.3) isn't.

 (Inspired by [http://stackoverflow.com/questions/28916291/associativity-
 of/28916978#28916978 this Stackoverflow question].)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10145>
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