[MacPorts] #46403: graphviz @2.38.0_0, graphviz-devel @2.39.20141230.0545_0: replaced deprecated Python variants with +python27

[MacPorts]

#46403: graphviz @2.38.0_0, graphviz-devel @2.39.20141230.0545_0: replaced
deprecated Python variants with +python27
-------------------------+-------------------------------------
 Reporter:  larryv@…     |      Owner:  ryandesign@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  graphviz graphviz-devel
-------------------------+-------------------------------------
 The [[attachment:graphviz.python.patch|attached patch]] adds a `+python27`
 variant to `graphviz` and `graphviz-devel` (untested) and retires the
 other Python variants.

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Ticket URL: <https://trac.macports.org/ticket/46403>
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