REPL doesn't handle blocks larger than the console window on some terminals

Bug report

Bug description:

On Windows, if the currently edited block does not fit in the console (the lines are too long and there are too many lines), and the cursor is moved around, the REPL's state gets corrupted: lines are overwritten with parts of other lines, parts of the prompt appear in places, the cursor behaviour doesn't match the text around it.

For example, in a small console window, I pressed Up to go back in history to this piece of colorsys:

def yiq_to_rgb(y, i, q):
    # r = y + (0.27*q + 0.41*i) / (0.74*0.41 + 0.27*0.48)
    # b = y + (0.74*q - 0.48*i) / (0.74*0.41 + 0.27*0.48)
    # g = y - (0.30*(r-y) + 0.11*(b-y)) / 0.59

    r = y + 0.9468822170900693*i + 0.6235565819861433*q
    g = y - 0.27478764629897834*i - 0.6356910791873801*q
    b = y - 1.1085450346420322*i + 1.7090069284064666*q

    if r < 0.0:
        r = 0.0
    if g < 0.0:
        g = 0.0
    if b < 0.0:
        b = 0.0
    if r > 1.0:
        r = 1.0
    if g > 1.0:
        g = 1.0
    if b > 1.0:
        b = 1.0
    return (r, g, b)

and then pressed some arrow keys to get:

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

Comienza reproduciendo el fallo de edición de la REPL en Windows con una ventana de consola demasiado pequeña para el bloque multilinea de colorsys; después, recorre los puntos de entrada del historial y de la edición del cursor de la REPL. Prueba las interacciones con las teclas de flecha descritas en el informe y verifica que las líneas, los prompts y la posición del cursor sigan alineados cuando el bloque exceda el tamaño de la ventana.