[MacPorts] #38898: UPDATE py-couchdbkit to 0.6.4

[MacPorts]

#38898: UPDATE py-couchdbkit to 0.6.4
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  Reporter:  jkrage@…       |      Owner:  petr@…
      Type:  update         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:
      Port:  py-couchdbkit  |
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Comment (by petr@…):

 Please provides any changes to existing ports as unified diffs. `py-
 couchdbkit.diff​` is an outdated patch. `Portfile.2` is more recent, but
 the corresponding diff is missing.

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Ticket URL: <https://trac.macports.org/ticket/38898#comment:10>
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