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.

tests:
* local sources are cached
* use git sources instead of local when removing objects
* update expected cache keys

Remove call to Element._source_cached() in _calculate_cache_key and
do not recalculate workspace keys.

tests: shell browsing of workspaces is currently broken

Check that sources are cached even if they are workspaced and do not
reset workspace cache data

partially reverts !1470
closes #1088

element.py: remove workspaces in cache key calc

Using the workspace source plugin, workspaces should now be handled like
sources for the purpose of calculating element cache keys.

partially reverts !1470
works towards #1073

Since the source keys are now calculated using the unique keys of the
workspace source, this change will break external tracking for open
workspaces. In future attempting to track an open workspace might raise
a SourceError. The test is rewritten to close the workspace before
tracking.

We also need to store the project name of dependencies in
the proto in order to reconstruct the graph.

This also means that we must include the project name of the
dependencies in the cache key, otherwise the proto and the
cache keys may fall out of sync.

We store the build dependency names in the artifact proto. This
should be reflected in the cache key dict.

add name to sources in cache key dict

Return if there is no result from parsing the element

If this is not present in the env the cli will throw an exception
closes #1074

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