refactor(fmt): format by ruff; add whitespace

Author: aekasitt

src/fastapi_csrf_protect/exceptions.py

@@ -9,6 +9,7 @@
 # HISTORY:
 # *************************************************************
 
+
 class CsrfProtectError(Exception):
   def __init__(self, status_code: int, message: str):
     self.status_code = status_code