[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3448: Convert modules that only reference `unicode` to `str`

[Tahoe-LAFS]

#3448: Convert modules that only reference `unicode` to `str`
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     Reporter:  rpatterson  |      Owner:  rpatterson
         Type:  task        |     Status:  new
     Priority:  normal      |  Milestone:  Support Python 3
    Component:  code        |    Version:
   Resolution:              |   Keywords:  review-needed
Launchpad Bug:              |
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Comment (by rpatterson):

 Branch needed more work, just created [the PR](https://github.com/tahoe-
 lafs/tahoe-lafs/pull/841).

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3448#comment:3>
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