[MacPorts] #47560: meld: version bump to @3.12.3 (Portfile attached)

[MacPorts]

#47560: meld: version bump to @3.12.3 (Portfile attached)
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  Reporter:  khepler@…  |      Owner:  landonf@…
      Type:  update     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  meld       |
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Comment (by khepler@…):

 (Re-)Discovered another issue:

 To run Meld, you have to set the PYTHONPATH environment variable to where
 Meld's python modules are installed.  In my port's case, that's
 "${prefix}/lib/python2.7/site-packages".  Can we do this in the port?  I
 think it would be optimal if Meld installed its modules in a path already
 searched by Python, but I couldn't figure out how to specify that to
 setup.py.

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Ticket URL: <https://trac.macports.org/ticket/47560#comment:2>
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