[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3442: Minor test runner improvements and docs

[Tahoe-LAFS]

#3442: Minor test runner improvements and docs
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     Reporter:  rpatterson          |      Owner:  rpatterson
         Type:  enhancement         |     Status:  new
     Priority:  minor               |  Milestone:  undecided
    Component:  dev-infrastructure  |    Version:  n/a
   Resolution:                      |   Keywords:
Launchpad Bug:                      |
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Comment (by rpatterson):

 [https://github.com/tahoe-lafs/tahoe-lafs/pull/830 PR]

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3442#comment:1>
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