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

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

Author: pre-commit-ci[bot]

conversions/binary_to_gray.py

@@ -5,6 +5,7 @@
 https://en.wikipedia.org/wiki/Gray_code
 """
 
+
 def binary_to_gray(binary: str) -> str:
     """
     Convert a binary number (as string) to its equivalent Gray code.