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

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

Author: pre-commit-ci[bot]

heap.py

@@ -43,6 +43,7 @@ def delete_max(self):
         self.heapify_down(0)
         return deleted_item
 
+
 def heap_sort(arr):
     heap = MaxHeap()
 
@@ -56,8 +57,9 @@ def heap_sort(arr):
 
     return arr
 
+
 arr = [4, 10, 3, 5, 1]
 arr = heap_sort(arr)
 
 # Displaying sorted array
-print("Sorted array:", arr)
+print("Sorted array:", arr)