[MacPorts] #37534: fix sparky for tcl/tk 8.6 migration

[MacPorts]

#37534: fix sparky for tcl/tk 8.6 migration
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 Reporter:  howarth@…  |      Owner:  macports-tickets@…
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.1.2
 Keywords:             |       Port:  sparky
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 The current sparky packaging is patched to build against tcl/tk 8.5.[[BR]]
 The attached Portfile.diff and revised sparky-build.diff updates the
 package to[[BR]]
 build against the new tcl/tk 8.6 in macports.

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Ticket URL: <https://trac.macports.org/ticket/37534>
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