Merge lp://staging/~unit193/bzr-fastimport/deletion-fixes into lp://staging/bzr-fastimport

Thanks Unit 193 for the patch. It looks well executed.

How hard do you think it would be to create a test (or tests) to demonstrate the problem(s) (absent the fix) and validate the fix? This is important to make sure no one else accidentally breaks this fix, reintroducing the problem(s), in the future.

I'd presume it wouldn't be too hard for someone used to the test framework, or writing tests. However, I am not that person.

I'll take a look at it and see if I can implement some decent tests within the test framework to cover the situations mentioned in all three linked bugs.

Is there any chance of getting this in? I've been using it ever since, and it's quite helpful to me so should equally be useful to others.

Please add some unit tests for it.

It's the kind of change that's likely to regress as other changes are made, and it is not clear to me that it won't have other fallout (and e.g. make files disappear that should be exported) - tests are a good way to demonstrate that.

There are also linked bugs that e.g. include smaller fixes - without having looked closely at the code, why are these fixes not appropriate?

@richard-wilbur The offered patch is applied in Ubuntu since 0.13.0+bzr361-1ubuntu1. Please consider merging it with or without an additional test.
It testing is really needed adding it to autopkgtests would be super easy.