Refactor: Clean up code formatting for consistency

examples/multi_file_bot/bot.py

@@ -16,7 +16,6 @@ async def main() -> None:
     dp.include_routers(
         handlers.start.start_router,
         handlers.echo.echo_router,
-
     )
 
     # Initialize Bot instance with a default parse mode which will be passed to all API calls

examples/multi_file_bot/handlers/__init__.py

@@ -1,2 +1 @@
-from . import start
-from . import echo
+from . import echo, start

examples/multi_file_bot/handlers/echo.py

@@ -5,6 +5,7 @@ from aiogram.types import Message
 # For each module with handlers we can create a separate router.
 echo_router = Router()
 
+
 @echo_router.message()
 async def echo_handler(message: Message) -> None:
     """