[MacPorts] #39265: graphviz +ruby: mtree violation by /System

[MacPorts]

#39265: graphviz +ruby: mtree violation by /System
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  Reporter:  angelo.graziosi@…  |      Owner:  ryandesign@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.1.3
Resolution:                     |   Keywords:
      Port:  graphviz           |
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Comment (by egall@…):

 (This was originally split off from #39259 for reference, btw)

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Ticket URL: <https://trac.macports.org/ticket/39265#comment:6>
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