[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2377: replace 'cond and one or tother' idiom with 'one if cond or tother'

[Tahoe-LAFS]

#2377: replace 'cond and one or tother' idiom with 'one if cond or tother'
---------------------+---------------------------
 Reporter:  daira    |          Owner:  daira
     Type:  defect   |         Status:  new
 Priority:  normal   |      Milestone:  undecided
Component:  code     |        Version:  1.10.0
 Keywords:  cleanup  |  Launchpad Bug:
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 In Python 2.5, the nearest equivalent to C's `cond ? one : tother` was the
 idiom `cond and one or tother`.
 In Python 2.6, a more precise equivalent is `one if cond else tother`.

 The former is error-prone: it evaluates to `tother` when `one` is falsy,
 which is the wrong thing. Since we now depend on Python 2.6, we can always
 use the latter.

 ("t'other" is Northern English dialect for "the other", if you were
 wondering about that.)

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2377>
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