[metrics-bugs] #21143 [Metrics/CollecTor]: remove 18 checkstyle complaints from CollecTor

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#21143: remove 18 checkstyle complaints from CollecTor
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     Reporter:  iwakeh             |      Owner:  metrics-team
         Type:  enhancement        |     Status:  new
     Priority:  Medium             |  Milestone:
    Component:  Metrics/CollecTor  |    Version:
     Severity:  Normal             |   Keywords:  metrics-help
Actual Points:                     |  Parent ID:
       Points:                     |   Reviewer:
      Sponsor:                     |
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 remove 18 checkstyle complaints from CollecTor

 Run `ant checks` to see which. Mostly line length issues.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21143>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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