flake8 fixes

menu.py

@@ -105,7 +105,6 @@ class MenuBoard(IBoard):
                 current_button_row += 1
             yield pygame.Rect(left, top, button_width, button_height)
 
-
     def handle_event(self, event: pygame.event.Event):
         for b in self.buttons:
             b.handle_event(event)
@@ -134,11 +133,14 @@ class App:
     def button_press_handler(self, text: str) -> Callable[[], None]:
         def impl():
             previous_board = self.board
+
             def thr_fun():
                 def end_thr():
                     self.board = previous_board
+
                 sleep(5)
                 self.task_q.put(end_thr)
+
             process_thr = Thread(target=thr_fun)
             process_thr.start()
             self.board = MessageBoard(self.get_screen_rect(), f"Wait: {text}")