[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2987: Add a Deferred-supporting `log_call`-alike to ease logging changes

[Tahoe-LAFS]

#2987: Add a Deferred-supporting `log_call`-alike to ease logging changes
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     Reporter:  exarkun  |      Owner:
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:  undecided
    Component:  unknown  |    Version:  1.12.1
   Resolution:           |   Keywords:  review-needed
Launchpad Bug:           |
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Changes (by exarkun):

 * keywords:   => review-needed


Comment:

 https://github.com/tahoe-lafs/tahoe-lafs/pull/563

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2987#comment:2>
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