[MacPorts] #20016: Update py-lint and py-lint25 to 0.18.0

[MacPorts]

#20016: Update py-lint and py-lint25 to 0.18.0
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 Reporter:  blair@…             |       Owner:  dh               
     Type:  update              |      Status:  new              
 Priority:  Normal              |   Milestone:                   
Component:  ports               |     Version:  1.7.1            
 Keywords:                      |        Port:  py-lint py-lint25
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 py-lint26 is at 0.18.0, can we get py-lint and py-lint25 updated
 to the same version?

 I can do the update as I have commit rights.

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Ticket URL: <http://trac.macports.org/ticket/20016>
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