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

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

tests/test_ujson.py

@@ -849,7 +849,9 @@ def default(value):
         return value
 
     now = dt.datetime.now()
-    assert ujson.dumps(now, default=default) == '"%s"' % now.strftime(iso8601_time_format)
+    assert ujson.dumps(now, default=default) == '"%s"' % now.strftime(
+        iso8601_time_format
+    )
 
     uuid4 = uuid.uuid4()
     assert ujson.dumps(uuid4, default=default) == '"%s"' % uuid4.hex