[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3603: Port allmydata.scripts to Python 3

[Tahoe-LAFS]

#3603: Port allmydata.scripts to Python 3
-------------------------+------------------------------
     Reporter:  jaraco   |      Owner:  jaraco
         Type:  defect   |     Status:  assigned
     Priority:  normal   |  Milestone:  Support Python 3
    Component:  unknown  |    Version:  n/a
   Resolution:           |   Keywords:
Launchpad Bug:           |
-------------------------+------------------------------

Comment (by jaraco):

 Attempting to run an invalid command, the rendering doesn't look right:

 {{{
 $ .tox/py36/bin/python -m allmydata.scripts.runner start out
 ...
 /Users/jaraco/code/public/tahoe-lafs/src/allmydata/scripts/runner.py:
 "UsageError('Unknown command: start',)"
 }}}

 Compare that to what's expected to be rendered on Python 2:

 {{{
 /Users/jaraco/code/public/tahoe-lafs/src/allmydata/scripts/runner.py:
 Unknown command: start
 }}}

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3603#comment:10>
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