[tor-bugs] #21531 [Core Tor/Chutney]: Fix chutney warnings.sh spacing

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#21531: Fix chutney warnings.sh spacing
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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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 `uniq -c` prints counts with variable spacing. We shouldn't carry that
 through to the output.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21531>
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