[metrics-bugs] #22594 [Metrics/Onionoo]: Escape characters in contact lines break hourly updater

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#22594: Escape characters in contact lines break hourly updater
-----------------------------+------------------------------
 Reporter:  karsten          |          Owner:  metrics-team
     Type:  defect           |         Status:  new
 Priority:  High             |      Milestone:
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:                   |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
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Comment (by iwakeh):

 Why two log statements?

  {{{
  catch (Throwable e) {
        /* Handle below. */
 +      log.error("Problem while parsing JSON: " + documentString, e);
 -      log.error(documentString);
 -      log.error(e.getMessage(), e);
  }
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22594#comment:4>
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