Render duplicate lines when submitting multiline text via the buffer editor

[sigoden]

Platform: Windows 10 Terminal software: Windows Terminal, Windows Powershell

Render duplicate lines when submitting multiline text via the buffer editor.

Steps to reproduce

1. pull the latest commit (7af8959)
2. run cargo run --example demo
3. type ctrl+o to open buffer editor
4. type multi-line text
5. exit the buffer editor
6. submit the buffer

Screenshots/Screencaptures

https://github.com/user-attachments/assets/fb67efe3-bd8e-40a8-8b73-020f2a6d867a