[GHC] #2050: GHCi should keep a persistent history file

[GHC]

#2050: GHCi should keep a persistent history file
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    Reporter:  ajd              |        Owner:         
        Type:  feature request  |       Status:  new    
    Priority:  normal           |    Milestone:         
   Component:  GHCi             |      Version:  6.8.2  
    Severity:  normal           |   Resolution:         
    Keywords:                   |     Testcase:         
Architecture:  Unknown          |           Os:  Unknown
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Comment (by judah):

 I have also often wished for this.  The header `<readline/history.h>`
 provides the functions `read_history` and `write_history` which are also
 present in editline.  This task will be easy to implement if we add those
 to the readline and editline packages.  (Although, a pure Haskell
 implementation would probably also be pretty easy to write.)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2050#comment:2>
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