[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3378: Port allmydata.util.encodingutil to Python 3, part 2

[Tahoe-LAFS]

#3378: Port allmydata.util.encodingutil to Python 3, part 2
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 Reporter:  itamarst  |          Owner:  itamarst
     Type:  defect    |         Status:  new
 Priority:  normal    |      Milestone:  Support Python 3
Component:  unknown   |        Version:  n/a
 Keywords:            |  Launchpad Bug:
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 Doing everything in a single branch was too much, so splitting off some
 work.

 1. Rename `to_str()` to `to_bytes()`, to prevent confusion.
 2. `quote_output()` shouldn't return bytes on Python 3, it should stick to
 unicode.
 3. This then percolates to a bunch of `quote_*` functions, some of which
 might need to still be bytes? Not sure.
 4. ...

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3378>
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