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

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

Author: pre-commit-ci[bot]

cellular_automata/von_neumann.py

@@ -571,6 +571,7 @@ def run_interactive_simulation(
 # Helper demo functions
 # -------------------------------------------------------------------------
 
+
 def demo_game_of_life() -> None:
     """Example 1: Conway's Game of Life (B3/S23)."""
     try:
@@ -656,6 +657,7 @@ def demo_statistics() -> None:
 # Main demo orchestrator
 # -------------------------------------------------------------------------
 
+
 def demonstrate_cellular_automaton_features() -> None:
     """Runs a set of cellular automaton demonstrations."""
     print("=" * 80)