[MacPorts] #53335: Do not allow installing ports with non-numerical revision (was: `port outdated` seems to fail on macOS Sierra, 10.12.2)

[MacPorts]

#53335: Do not allow installing ports with non-numerical revision
------------------------+-------------------
  Reporter:  ballapete  |      Owner:
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:  2.3.5
Resolution:             |   Keywords:
      Port:             |
------------------------+-------------------
Changes (by raimue):

 * port:  emacs =>


Comment:

 I consider this a bug in base. port should fail and abort when trying to
 install a port with a non-numerical revision. The best fix would be to
 stop that early on and reject such an invalid revision.

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Ticket URL: <https://trac.macports.org/ticket/53335#comment:7>
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