[MacPorts] #31351: Convert py26-argparse to unified port and update version

[MacPorts]

#31351: Convert py26-argparse to unified port and update version
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 Reporter:  singingwolfboy@…             |       Owner:  stromnov@…           
     Type:  defect                       |      Status:  new                  
 Priority:  Normal                       |   Milestone:                       
Component:  ports                        |     Version:  2.0.3                
 Keywords:                               |        Port:  py26-argparse        
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 I'm attaching a new Portfile for a unified py-argparse port for python2.4,
 python2.5, and python2.6, as well as a diff of what has changed. stromnov,
 if you're alright with these changes, please remove the py26-argparse port
 and add the new py-argparse port -- or if you would prefer, I can do this.

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Ticket URL: <https://trac.macports.org/ticket/31351>
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