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

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docs/source/admin/log-messages.md

@@ -9,6 +9,7 @@ log messages, and what necessary actions to take.
 ### Example
 
 Your log might display lines that seem cryptic
+
 ```
 [W 2022-03-10 17:25:19.774 JupyterHub base:1349] Failing suspected API request to not-running server: /hub/user/<user-name>/api/metrics/v1
 ```