[MERGE] Convert tests.blackbox.test_b* to use internals where appropriate

[Daniel Watkins]

Attached are fixes for tests.blackbox.test_bound_branches and
tests.blackbox.test_branch.

-- 
Daniel Watkins (Odd_Bloke)
University of Warwick Christian Focus President
University of Warwick Computing Society WUGLUG Liaison Officer
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: b.blackbox_fix.bundle
Url: https://lists.ubuntu.com/archives/bazaar/attachments/20070803/eb8cc6b5/attachment-0001.diff 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 252 bytes
Desc: OpenPGP digital signature
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20070803/eb8cc6b5/attachment-0001.pgp