diff --git a/jupyter_client/manager.py b/jupyter_client/manager.py
index 59a6b644..47a9b374 100644
--- a/jupyter_client/manager.py
+++ b/jupyter_client/manager.py
@@ -109,10 +109,10 @@ def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
         """Initialize a kernel manager."""
         if args:
             warnings.warn(
-                'Passing positional only arguments to '
-                '`KernelManager.__init__` is deprecated since jupyter_client'
-                ' 8.6, and will become an error on future versions. Positional '
-                ' arguments have been ignored since jupyter_client 7.0',
+                "Passing positional only arguments to "
+                "`KernelManager.__init__` is deprecated since jupyter_client"
+                " 8.6, and will become an error on future versions. Positional "
+                " arguments have been ignored since jupyter_client 7.0",
                 DeprecationWarning,
                 stacklevel=2,
             )