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

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

Author: pre-commit-ci[bot]

sorts/exchange_sort.py

@@ -18,6 +18,8 @@ def exchange_sort(data: list) -> list:
  data[i], data[j] = data[j], data[i]
  return data
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
  import doctest
+
  doctest.testmod()