[merge] restore 'bzr push' within a single repository

[John Arbash Meinel]

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Robert Collins wrote:
> Robert Collins has voted +1 (conditional).
> Status is now: Conditionally approved
> Comment:
> Looks good, though I dont think the right place to test pushing between
> two branches in the same repository is our UI tests. Instead, it should
> be in branch_implementations, so that different format branches get the
> test exercised. Not all branches work with shared repositories - but
> doing self.make_repository('.', shared=True) in the test, should do the
> right thing for the test suite IIRC.
> 
> For details, see:
> http://bundlebuggy.aaronbentley.com/request/%3C45D0ED91.8050509%40arbash-meinel.com%3E

I switched it to being a branch_implementations test.

It turns out that there are a couple of exceptions to catch (between
make_repository and self.branch_format.initialize). But if you do that,
then you handle formats that aren't compatible with shared repositories,
and ones that can't be initialized.

John
=:->

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