[tor-bugs] #33196 [Core Tor/Tor]: Make flake8 test Python 3 syntax

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#33196: Make flake8 test Python 3 syntax
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     Reporter:  teor          |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.4.3.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:  #33193
       Points:  1             |   Reviewer:
      Sponsor:                |
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 Follow up to #33193.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33196>
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