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

Start by reproducing the REPL editing failure on Windows with a console window too small for the multiline colorsys block, then move through the REPL's history and cursor-editing entry points. Exercise the arrow-key interactions described in the report and verify that lines, prompts, and cursor position remain aligned when the block exceeds the window.