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

reedline-bug.mp4

[fdncred]

I'm pretty sure I have an open issue like this in nushell too.

[sigoden]

Also reported at nushell/nushell#13240