[MacPorts] #67226: Export command does nothing

[MacPorts]

#67226: Export command does nothing
--------------------------+--------------------------
 Reporter:  contraDanc3r  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  graphviz-gui
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 images of .dot files work perfectly. The File->Export command does
 nothing. This is on macos 12.6.1

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Ticket URL: <https://trac.macports.org/ticket/67226>
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