Some minor cleanup.

src/stat_tracker.py

@@ -10,10 +10,10 @@ class StatTracker:
             'Items collected': 0,
             'Total time': 0
         }
-        
+
         # Create level stats from total (shallow copy is fine here)
         self.level = self.total.copy()
-        
+
         self.total['levelsCompleted'] = 0
 
     def reset_level(self):
@@ -27,18 +27,18 @@ class StatTracker:
                 self.level[key] = []
             elif self.level[key] is None:
                 self.level[key] = None
-    
+
     def update_stat(self, statName, value=1, levelOnly=False):
         """Update a stat in both level and total (unless levelOnly is True)"""
         if statName in self.level:
             self.level[statName] += value
         if not levelOnly and statName in self.total:
             self.total[statName] += value
-            
+
     def get_level_stat(self, statName):
         """Get a level stat"""
         return self.level.get(statName, 0)
-        
+
     def get_total_stat(self, statName):
         """Get a total stat"""
         return self.total.get(statName, 0)