[Bug] Can't type spaces or uppercase letters into a multiline prompt

[MattStypa]

Environment

• OS: macOS
• Node Version: v22.17.0
• Package: @clack/core
• Package Version: v1.3.0

Describe the bug
Can't type spaces or uppercase letters into a multiline prompt

To Reproduce
https://stackblitz.com/edit/node-853mspgi?file=index.js

Steps to reproduce the behavior:

• node index.js
• Try typing in capital letters and spaces

Expected behavior
I should be able to type in capital letters and spaces

Additional Information
There is also some odd behavior when backspacing at the start of the line