[MacPorts] #64325: app PortGroup: app.icon unable to handle filenames with spaces

[MacPorts]

#64325: app PortGroup: app.icon unable to handle filenames with spaces
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  Reporter:  jasonliu--  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:
      Port:  pg-app-1.0  |
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Comment (by jmroot):

 Try that. All options are lists, so some characters need to be quoted in
 them, one of which is spaces. Since this option is only expected to
 contain a single path, using `join` to flatten the list into a string
 should work fine. There was also some missing quoting in shell commands
 that would have caused problems with filenames containing spaces.

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Ticket URL: <https://trac.macports.org/ticket/64325#comment:2>
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