[REFACTOR] clean code: variable naming

Author: Gonzalo Diaz

src/hackerrank/interview_preparation_kit/sorting/ctci_comparator_sorting.py

@@ -17,9 +17,9 @@ def __repr__(self) -> str:
         # Given code
         return ''
 
-    def comparator(self, b: Player) -> int:
+    def comparator(self, b_player: Player) -> int:
         # Given code
-        return 0 * b.score
+        return 0 * b_player.score
 
 # End Given code