Re: [GSoC PATCH v9 3/5] repo: add the field layout.bare

I also care about future-proofing, though.  When Git is built with
WITH_BREAKING_CHANGES=YesPlease, this test would break as the
default reference backend will be reftable in that alternate world,
wouldn't it?

To be honest, it wouldn't matter what are the keys selected for
testing this behavior. I'm only using references.format because it
was the first that I implemented. But given that, I can also change
their order to something like:

[1/5] repo: declare the repo command
[2/5] repo: add the field layout.bare
[3/5] repo: add the field layout.shallow
[2/5] repo: add the field references.format
[5/5] repo: add the --format flag

This way, this tests could be placed in 3/5 and using layout.bare and
layout.shallow as keys.

Thanks!