[MacPorts] #20955: TypeError: sequence item 0: expected string, NoneType found

[MacPorts]

#20955: TypeError: sequence item 0: expected string, NoneType found
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 Reporter:  ryandesign@…             |       Owner:  wsiegrist@…        
     Type:  defect                   |      Status:  new                
 Priority:  Normal                   |   Milestone:                     
Component:  server/hosting           |     Version:                     
 Keywords:                           |        Port:                     
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Comment(by ryandesign@…):

 The problem only occurred when using Preview after making changes to the
 comment text. When I actually submitted the changes, they showed up fine.

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Ticket URL: <http://trac.macports.org/ticket/20955#comment:1>
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