fix black linting error

Signed-off-by: Armin Tänzer <armin.taenzer@tngtech.com>

Author: armintaenzertng

tests/spdx3/writer/tag_value/test_write_document.py

@@ -29,9 +29,7 @@ def test_render_creation_info():
     output_str = io.StringIO()
     write_spdx_document(spdx_document, text_output=output_str)
 
-    assert (
-        output_str.getvalue()
-        == """\
+    assert output_str.getvalue() == """\
 ## SPDX Document
 SPDXID: SPDXRef-FOO
 name: BAR
@@ -42,4 +40,3 @@ def test_render_creation_info():
   data license: CC0-1.0
 elements: 
 """  # noqa: W291 # elements: are printed with a space
-    )