[MacPorts] #57230: Unable to install rb-rubygems on Mojave

[MacPorts]

#57230: Unable to install rb-rubygems on Mojave
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  Reporter:  jpmelko      |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  rb-rubygems  |
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Comment (by jmroot):

 This is because there are two traces on ruby.bin: the one set up by
 `default` and the one set up by `option_proc`. Using both is unnecessary
 and confusing.

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Ticket URL: <https://trac.macports.org/ticket/57230#comment:6>
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