[Bug 72725] Backport prevu

[John Dong]

Public bug reported:

prevu is the Backports team's automated backporting script. It has been
used extensively by the backporters and testerson Edgy and Dapper, and
thanks to Martin's hard work is now in Feisty.

** Affects: dapper-backports (upstream)
     Importance: Undecided
         Status: In Progress
** Affects: edgy-backports (upstream)
     Importance: Undecided
         Status: In Progress

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Backport prevu
https://launchpad.net/bugs/72725