python: Strip leading and trailing spaces from docstrings.

This is enforced by Black ≥ 21.4b0.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

scripts/lib/check_rabbitmq_queue.py

@@ -110,7 +110,7 @@ CRITICAL_COUNT_THRESHOLD_DEFAULT = 50
 
 
 def check_other_queues(queue_counts_dict: Dict[str, int]) -> List[Dict[str, Any]]:
-    """ Do a simple queue size check for queues whose workers don't publish stats files."""
+    """Do a simple queue size check for queues whose workers don't publish stats files."""
 
     results = []
     for queue, count in queue_counts_dict.items():