[MERGE] Update PPA documentation and scripts

[John Arbash Meinel]

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John Ferlito wrote:
> On Thu, May 28, 2009 at 05:11:46PM -0400, Jelmer Vernooij wrote:
>> Jelmer Vernooij has voted tweak.
>> Status is now: Conditionally approved
>> Comment:
>> There is still a reference to bzr-svn/experimental rather than  
>> bzr-svn/unstable in tools/packaging/update-packaging-branches.sh.

+   There is a helper script which will update the contro file and commit it
+   for all of your ``$UBUNTU_RELEASES``. It is available as::

^- small typo here "contro" => "control"

+   The must supply the versions as arguments as follows
+   OLD_VERSION CURRENT_VERSION NEXT_VERSION, such as::

^- Not quite a sentence

Otherwise if this works for you:

BB:tweak

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