[MacPorts] #56664: enable diff-highlight in git, with variant

[MacPorts]

#56664: enable diff-highlight in git, with variant
--------------------------+----------------------
  Reporter:  iEFdev       |      Owner:  ci42
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  git          |
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Changes (by mf2k):

 * version:  2.5.2 =>
 * type:  request => enhancement


Comment:

 Note that a "request" ticket type is only for requesting a new port.

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Ticket URL: <https://trac.macports.org/ticket/56664#comment:3>
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