[MacPorts] #13206: upgrade 'grep' port to 2.5.3

[MacPorts]

#13206: upgrade 'grep' port to 2.5.3
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  Reporter:  spovich at gmail.com  |       Owner:  waqar at macports.org
      Type:  enhancement        |      Status:  reopened          
  Priority:  Normal             |   Milestone:  Port Updates      
 Component:  ports              |     Version:  1.5.0             
Resolution:                     |    Keywords:                    
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Comment (by waqar at macports.org):

 I am working on this one. I tested on Leopard, I need to double check on
 Tiger.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/13206#comment:6>
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