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

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

Author: pre-commit-ci[bot]

ipykernel/zmqshell.py

@@ -251,6 +251,7 @@ def unregister_hook(self, hook):
 @magics_class
 class KernelMagics(Magics):
     """Kernel magics."""
+
     shell: InteractiveShell | None  # already imported in zmqshell.py
 
     # ------------------------------------------------------------------------