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

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

Author: pre-commit-ci[bot]

examples/hex_snowflake/hex_snowflake/cell.py

@@ -44,7 +44,9 @@ def determine_state(self):
         if not self.is_alive and self.is_considered:
             # Get the neighbors and apply the rules on whether to be alive or dead
             # at the next tick.
-            live_neighbors = sum(neighbor.is_alive for neighbor in self.cell.neighborhood.agents)
+            live_neighbors = sum(
+                neighbor.is_alive for neighbor in self.cell.neighborhood.agents
+            )
 
             if live_neighbors == 1:
                 self._next_state = self.ALIVE