black reformatting

webserver.py

@@ -101,13 +101,14 @@ async def push_message(
 async def get_all_variables() -> AllVariablesModel:
     return settings.variables
 
+
 @app.get("/variables/{key}")
 async def get_variable(key: str) -> VariableModel:
     try:
         value = settings.variables[key]
     except KeyError:
         raise HTTPException(status_code=404, detail="Variable not found")
-    return Response(str(value), media_type='text/plain')
+    return Response(str(value), media_type="text/plain")
 
 
 def first_matching(lst: list, condition: Callable[[Any], bool]) -> int: