[Bug] when adding initiailValue there's a trailing underscore which seems to be a cursor

Environment

OS: [e.g. macOS, Windows]: macOS
Node Version: [e.g. v18.14.0]: v10.9.1
Package: [e.g. @clack/prompts, @clack/core]: @clack/prompts": "^0.6.3",

Describe the bug A clear and concise description of what the bug is. When adding initiailValue for promptText there's a trailing underscore which seems to be a cursor; this leads to confusing experience, especially if we already have an underscore in the text

To Reproduce Include a link to a minimal reproduction using node.new

const name = await promptText({
    message:
      "What's the secret name?",
    initialValue: 'MY_TOP_SECRET',
  });

Results in:

Steps to reproduce the behavior:

Include reproduction steps

Expected behavior A clear and concise description of what you expected to happen. There should be no underscore that acts like a cursor. Just the cursor should be displayed.

Additional Information If applicable, add screenshots to help explain your problem.

bombshell-dev / clack

[Bug] when adding initiailValue there's a trailing underscore which seems to be a cursor #127