Linting, removed extra line from pyproject.toml.

cista/app.py

@@ -39,14 +39,12 @@ async def main_start(app, loop):
     app.ctx.threadexec = ThreadPoolExecutor(max_workers=8)
 
 
-
 @app.after_server_stop
 async def main_stop(app, loop):
     await watching.stop(app, loop)
     app.ctx.threadexec.shutdown()
 
 
-
 @app.on_request
 async def use_session(req):
     req.ctx.session = session.get(req)