[MacPorts] #53404: `port upgrade outdated` changes colours in terminal emulation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#53404: `port upgrade outdated` changes colours in terminal emulation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:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:
Resolution:             |   Keywords:
      Port:             |
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Comment (by ballapete):

 The bug in GNU Emacs 28.0.50, i.e. in `port emacs-devel` seems to have
 been fixed. I ran `port -vd upgrade outdated` in GNU Emacs' shell buffer
 and it did not happen that all the text became red. I could observe that
 colour changed for different sort of output from port or other tools till
 the end. It changed forwards and backwards many times.

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Ticket URL: <https://trac.macports.org/ticket/53404#comment:11>
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