Update app.py

app.py

@@ -173,7 +173,7 @@ class Environment:
                 count = len([cell for cell in self.cells if cell.modifications])
             self.population_history[cell_type].append(count)
 
-     def get_visualization_data(self):
+    def get_visualization_data(self):
         cell_data = {
             "prokaryote": {"x": [], "y": [], "size": [], "color": "lightblue", "symbol": "circle"},
             "early_eukaryote": {"x": [], "y": [], "size": [], "color": "green", "symbol": "square"},