Fixed typo (#5439)

Changed it's (it is) to its
2021-10-20 01:09:15 +05:30
parent 21cf3cc260
commit d32d0158a3
1 changed files with 1 additions and 1 deletions
--- a/data_structures/binary_tree/binary_tree_mirror.py
+++ b/data_structures/binary_tree/binary_tree_mirror.py
@@ -1,6 +1,6 @@
 """
 Problem Description:
-Given a binary tree, return it's mirror.
+Given a binary tree, return its mirror.
 """