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

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

docs/gen_doc_stubs.py

@@ -1,4 +1,5 @@
 """Generate documentation stubs."""
+
 from pathlib import Path
 from typing import Set
 

psmq/message.py

@@ -1,4 +1,5 @@
 """Messages for PSMQ."""
+
 from dataclasses import dataclass, field
 from datetime import datetime, timedelta
 from typing import Any, Optional

psmq/utils.py

@@ -1,4 +1,5 @@
 """Utility functions for the psmq package."""
+
 from itertools import islice
 from typing import Any, Iterable, Tuple