[MacPorts] #62036: git @2.30.0: gui and gitk commands don't work: Error in startup script: couldn't connect to display ":0"

[MacPorts]

#62036: git @2.30.0: gui and gitk commands don't work: Error in startup script:
couldn't connect to display ":0"
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  Reporter:  mohd-akram  |      Owner:  ci42
      Type:  defect      |     Status:  reopened
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  git         |
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Comment (by mohd-akram):

 gitk is using MacPorts Tk. git-gui, a different program that also comes
 with git isn't. I mentioned the two different error messages in the issue.

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Ticket URL: <https://trac.macports.org/ticket/62036#comment:17>
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