[MacPorts] #53404: `port upgrade outdated` changes colours in terminal emulation

[MacPorts]

#53404: `port upgrade outdated` changes colours in terminal emulation
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  Reporter:  ballapete  |      Owner:
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:  macOS Sierra, GNU Emacs,
      Port:  port       |
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Comment (by ballapete):

 The second screenshot shows once more that the colour setting in the bash
 command line prompt is not able to change the wrong colour port has set. I
 have use actively another programme to normalise the colours. (ec2list is
 some Python script.)

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Ticket URL: <https://trac.macports.org/ticket/53404#comment:1>
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