As discussed over the mailing list, reformat code using Black. This is a
one-off change to reformat all our codebase. Moving forward, we
shouldn't expect such blanket reformats. Rather, we expect each change
to already comply with the Black formatting style.

Now that both are equivalent, we can skip the sanitization part before
the yaml call.

  o Test error conditions for showing an unfetched junctioned project

  o Test error conditions for showing an untracked junctioned project

Both tests check both modes of ref-storage.

This adds a new shared helper function `generate_junction`

Make buildtrack.py and track.py share the same configure_project() helper.

Seems all the test modules have one and as I recall it can
cause problems when they are missing in the test dirs.