[tor-bugs] #21548 [Core Tor/Chutney]: Don't colour warnings when outputting to a file

[Tor Bug Tracker & Wiki]

#21548: Don't colour warnings when outputting to a file
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     Reporter:  teor              |      Owner:  teor
         Type:  defect            |     Status:  new
     Priority:  Medium            |  Milestone:
    Component:  Core Tor/Chutney  |    Version:
     Severity:  Normal            |   Keywords:
Actual Points:                    |  Parent ID:  #21371
       Points:  0.1               |   Reviewer:
      Sponsor:                    |
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 This is surprisingly easy to implement.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21548>
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