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

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

Author: pre-commit-ci[bot]

Diff for: maths/base_neg2_conversion.py

@@ -1,4 +1,6 @@
 import doctest
+
+
 def decimal_to_negative_base_2(n):
     """
     This function returns the number negative base 2 of the decimal number of the input data.
@@ -33,5 +35,6 @@ def decimal_to_negative_base_2(n):
 
     return int(ans)
 
+
 if __name__ == "__main__":
     doctest.testmod()