[haskeline] #28: Add kill ring

[haskeline]

#28: Add kill ring
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Reporter:  judah        |        Owner:       
    Type:  enhancement  |       Status:  new  
Priority:  minor        |    Milestone:  0.6.2
 Version:               |   Resolution:       
Keywords:               |  
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Changes (by judah):

  * milestone:  => 0.6.2

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Ticket URL: <http://trac.haskell.org/haskeline/ticket/28#comment:3>
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