[MacPorts] #44526: update for xxdiff

[MacPorts]

#44526: update for xxdiff
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  Reporter:  rjvbertin@…  |      Owner:  macports-tickets@…
      Type:  update       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  xxdiff       |
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Comment (by egall@…):

 Heh, and I just installed the version that uses qt3 today, too... anyways,
 the diff should be of the unified type (i.e. `diff -u`).

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Ticket URL: <https://trac.macports.org/ticket/44526#comment:1>
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