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

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

Author: pre-commit-ci[bot]

sorts/heap_sorting.py

@@ -11,6 +11,7 @@ def heapify(arr, n, i):
         arr[i], arr[largest] = arr[largest], arr[i]
         heapify(arr, n, largest)
 
+
 def heap_sort(arr):
     n = len(arr)
     for i in range(n // 2 - 1, -1, -1):
@@ -19,6 +20,7 @@ def heap_sort(arr):
         arr[i], arr[0] = arr[0], arr[i]
         heapify(arr, i, 0)
 
+
 if __name__ == "__main__":
     arr = [12, 11, 13, 5, 6, 7]
     print("Original array:", arr)