Chore: Apply manual Black-style formatting

Author: AlexZMLyu

packages/google-cloud-bigquery-storage/samples/pyarrow/append_rows_with_arrow.py

@@ -100,7 +100,10 @@ def make_table(project_id, dataset_id, bq_client):
 
 
 def create_stream(bqstorage_write_client, table):
-    stream_name = f"projects/{table.project}/datasets/{table.dataset_id}/tables/{table.table_id}/_default"
+    stream_name = (
+        f"projects/{table.project}/datasets/{table.dataset_id}/"
+        f"tables/{table.table_id}/_default"
+    )
     request_template = gapic_types.AppendRowsRequest()
     request_template.write_stream = stream_name