Refactor flash_sort.py to resolve ruff check erros

Author: yashleo

sorts/flash_sort.py

@@ -96,4 +96,5 @@ def flash_sort(self) -> None:
         unsorted = [int(item.strip()) for item in user_input.split(",")]
     sorter = FlashSort(unsorted, n_classes=5)
     sorter.flash_sort()
-    print(unsorted)
+    print(unsorted)
+