[MacRuby] #952: Should set got string to $_ when calls StringIO#gets #readline.

[MacRuby]

#952: Should set got string to $_ when calls StringIO#gets #readline.
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 Reporter:  watson1978@…          |       Owner:  lsansonetti@…        
     Type:  defect                |      Status:  new                  
 Priority:  minor                 |   Milestone:  MacRuby 1.0          
Component:  MacRuby               |    Keywords:                       
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Comment(by lsansonetti@…):

 #1008 may be fixed after your patch.

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Ticket URL: <http://www.macruby.org/trac/ticket/952#comment:6>
MacRuby <http://macruby.org/>