func (t *Terminal) SetPrompt(prompt string) {
	t.lock.Lock()
	defer t.lock.Unlock()

	t.prompt = []rune(prompt)
}

func (t *Terminal) clearAndRepaintLinePlusNPrevious(numPrevLines int) {
	// Move cursor to column zero at the start of the line.
	t.move(t.cursorY, 0, t.cursorX, 0)
	t.cursorX, t.cursorY = 0, 0
	t.clearLineToRight()
	for t.cursorY < numPrevLines {