[GHC] #2798: Enable "rec" keyword when RecursiveDo is enabled?

[GHC]

#2798: Enable "rec" keyword when RecursiveDo is enabled?
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    Reporter:  nominolo          |        Owner:                  
        Type:  task              |       Status:  new             
    Priority:  normal            |    Milestone:                  
   Component:  Compiler          |      Version:  6.11            
    Severity:  minor             |   Resolution:                  
    Keywords:                    |     Testcase:                  
Architecture:  Unknown/Multiple  |           Os:  Unknown/Multiple
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Comment (by ross):

 The idea of "rec" was to use it with plain "do", to indicate feedback
 explicitly as an alternative to using "mdo".  Many users of arrow notation
 prefer to do that.  As you say, it's not much use together with "mdo".

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2798#comment:1>
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