[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

tests/version/test_markers.py

@@ -163,10 +163,7 @@ def test_single_marker_union():
     m = parse_marker('sys_platform == "darwin"')
 
     union = m.union(parse_marker('implementation_name == "cpython"'))
-    assert (
-        str(union)
-        == 'sys_platform == "darwin" or implementation_name == "cpython"'
-    )
+    assert str(union) == 'sys_platform == "darwin" or implementation_name == "cpython"'
 
     m = parse_marker('python_version >= "3.4"')