fix issue

Author: suryapratapsinghsuryavanshi

strings/alternative_string_arrange.py

@@ -5,13 +5,13 @@ def alternative_string_arrange(first_str: str, second_str: str) -> str:
     :param second_str:
     :return: String
     >>> alternative_string_arrange("ABCD", "XY")
-    AXBYCD
+    "AXBYCD"
     >>> alternative_string_arrange("XY", "ABCD")
-    XAYBCD
+    "XAYBCD"
     >>> alternative_string_arrange("AB", "XYZ")
-    AXBYZ
+    "AXBYZ"
     >>> alternative_string_arrange("ABC", "")
-    ABC
+    "ABC"
     """
     first_str_length: int = len(first_str)
     second_str_length: int = len(second_str)