[MacPorts] #25189: supported_archs is not documented in man portfile

[MacPorts]

#25189: supported_archs is not documented in man portfile
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 Reporter:  blair@…             |       Owner:  cal@…           
     Type:  defect              |      Status:  assigned        
 Priority:  Normal              |   Milestone:                  
Component:  guide               |     Version:  1.9.0           
 Keywords:  haspatch            |        Port:                  
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Changes (by cal@…):

  * status:  new => assigned
  * owner:  markd@… => cal@…


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Ticket URL: <https://trac.macports.org/ticket/25189#comment:5>
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