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

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

Author: pre-commit-ci[bot]

maths/reverse_number_pattern.py

@@ -34,5 +34,5 @@ def reverse_number_pattern(n: int) -> List[str]:
 
 if __name__ == "__main__":
     import doctest
-    doctest.testmod()
 
+    doctest.testmod()