🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

google/cloud/spanner_v1/_helpers.py

@@ -343,6 +343,7 @@ def parse_num(s: str, suffix: str) -> int:
 
         return cls(months=total_months, days=days, nanos=nanos)
 
+
 def _make_value_pb(value):
     """Helper for :func:`_make_list_value_pbs`.
 

tests/system/test_session_api.py

@@ -2973,7 +2973,9 @@ def insert_test1(transaction):
         )
 
     def insert_test2(transaction):
-        keys, placeholders = get_param_info(["key", "create_time", "expiry_time"], database_dialect)
+        keys, placeholders = get_param_info(
+            ["key", "create_time", "expiry_time"], database_dialect
+        )
         transaction.execute_update(
             f"""
             INSERT INTO IntervalTable (key, create_time, expiry_time)
@@ -3078,7 +3080,6 @@ def test_interval_array_param(transaction):
 
         assert intervals[3] is None
 
-
     def test_interval_array_cast(transaction):
         results = list(
             transaction.execute_sql(