Black tests

[aucampia]

Summary of changes

This changes black config to not exclude tests, once we are ready to
merge this we can use pre-commit.ci autofix to actually apply black,
thereby not having to worry if something more slipped in.

Checklist

• Checked that there aren't other open pull requests for
  the same change.
• Considered granting push permissions to the PR branch,
  so maintainers can fix minor issues and keep your PR up to date.

[aucampia]

Not sure how everyone feels about this, I find that not having black on tests makes it more likely to get merge conflicts, and most of the test files are more or less black compliant anyway, so this does not make a huge difference. I'm fine if we don't merge this, but would like to consider it.

[aucampia]

@gjhiggins seeing as you work a lot on test it probably makes sense to check with you also, not sure if you find black a nuisance or a benefit.

[ghost]

@gjhiggins seeing as you work a lot on test it probably makes sense to check with you also, not sure if you find black a nuisance or a benefit.

Thanks for the consideration, I think black is an extremely useful benefit and makes a significant positive contribution both to reducing the maintenance effort and to supporting a well-founded shared model of the codebase.

fwiw, black would reformat 37 files in the test subdirectory:

test/helper.py
test/jsonld/runner.py
test/jsonld/test_localsuite.py
test/jsonld/test_onedotone.py
test/jsonld/test_testsuite.py
test/plugins/parser/example/rdflib/plugin/parser/__init__.py
test/test_conjunctivegraph/test_conjunctivegraph_generators.py
test/test_conjunctivegraph/test_conjunctivegraph_operator_combinations.py
test/test_definednamespace.py
test/test_extras_external_graph_libs.py
test/test_graph/test_graph_context.py
test/test_graph/test_graph_formula.py
test/test_graph/test_graph_generators.py
test/test_graph/test_graph_http.py
test/test_graph/test_slice.py
test/test_infixowl.py
test/test_issues/test_issue1404.py
test/test_issues/test_issue1484.py
test/test_literal/test_normalized_string.py
test/test_literal/test_term.py
test/test_literal/test_tokendatatype.py
test/test_misc/test_b64_binary.py
test/test_misc/test_create_input_source.py
test/test_misc/test_parse_file_guess_format.py
test/test_misc/test_prefix_types.py
test/test_namespace/test_definednamespace_creator.py
test/test_parsers/test_empty_xml_base.py
test/test_parsers/test_parser_hext.py
test/test_rdfxml.py
test/test_serializers/test_serializer_hext.py
test/test_sparql/test_construct_bindings.py
test/test_sparql/test_evaluate_bind.py
test/test_sparql/test_operators.py
test/test_sparql/test_prepare.py
test/test_sparql/test_sparql.py
test/test_tools/test_csv2rdf.py
test/test_typing.py

For convenience, I'm including the diff here (having browsed it) because I'm inclined to just let it rip and merge the result.
test.diff.gz

[aucampia]

Planning to merge this on 2022-04-20.

[aucampia]

@gjhiggins with all the work on tests, I think you are right, I was waiting for #1686 but I don't think it is coming soon, so I'm just going to go ahead with this and we can just rebase all the other things.

[aucampia]

pre-commit.ci autofix