[MacPorts] #43222: mkvtoolnix: upgrade to version 6.8.0

[MacPorts]

#43222: mkvtoolnix: upgrade to version 6.8.0
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  Reporter:  dgonyier@…  |      Owner:  macports-tickets@…
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  mkvtoolnix  |
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Comment (by egall@…):

 Replying to [comment:7 mojca@…]:
 > Replying to [comment:5 egall@…]:
 > > mkvtoolnix already has a dependency on the ruby port, so I doubt that
 what the system ruby is on the buildbots matters...
 >
 > It does because the file is using `#!/usr/bin/env ruby`.

 I thought that the MacPorts ruby would appear first in the path that
 `/usr/bin/env` searches though? Actually I suppose that would only be the
 case if the user made symlinks with the `ruby_select` port though... I
 guess the current dependency on the ruby port must just be a leftover from
 before the `ruby_select` port was introduced then...

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Ticket URL: <https://trac.macports.org/ticket/43222#comment:8>
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