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

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

Author: pre-commit-ci[bot]

strings/swapcase.py

@@ -9,7 +9,7 @@
 """
 
 
-def swap_case(input_string : str) -> str:
+def swap_case(input_string: str) -> str:
     """This method will swap the cases of a given string
     eg: input: input_string= "Hello" output: swapped_string="hELLO" """
     list_representation = list(input_string)