[MacPorts] #58452: `sudo port upgrade <some_port>` tab completion error

[MacPorts]

#58452: `sudo port upgrade <some_port>` tab completion error
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 Reporter:  paxperscientiam  |      Owner:  (none)
     Type:  defect           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:  2.5.4
 Keywords:                   |       Port:
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 Never noticed this before, so it may be a new thing. Basically, after
 writing, for example,  `sudo port upgrade a` and tabbing, the first
 completion result is "Warning: port definitions are more than two weeks
 old, consider updating them by running 'port selfupdate'."

 Is this intentional?


 Demo:
 [https://www.dropbox.com/s/n7v8312bx5l8uej/Screen%20Recording%202019-05-07%20at%209.53.15%20AM.mov?dl=0]

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Ticket URL: <https://trac.macports.org/ticket/58452>
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