[GHC] #2812: For ghci, drop editline in favour of haskeline

[GHC]

#2812: For ghci, drop editline in favour of haskeline
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    Reporter:  igloo             |        Owner:                  
        Type:  task              |       Status:  new             
    Priority:  high              |    Milestone:  6.12 branch     
   Component:  GHCi              |      Version:  6.10.1          
    Severity:  normal            |   Resolution:                  
    Keywords:                    |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Changes (by korpios):

 * cc: korpios at korpios.com (added)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2812#comment:5>
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