Decide how to use `echo_char` in `getpass.fallback_getpass`

Hello everyone, I am a Chinese high school student. This is my first contribution to cpython on GitHub. If there are any errors, please kindly point them out. Thank you!
I noticed that in the getpass library of Python 3.14, there was a seemingly useless function call in fallback_getpass: _check_echo. This function was originally designed to check if the echo character is valid, but I think this call is redundant because:

1. fallback_getpass is only called when the terminal settings cannot be controlled, and the echo_char parameter actually does not work properly at this time
   2.In a fallback scenario, even if echo_char is provided, password echo control cannot be implemented
   I suggest removing this unnecessary call. Modify the code as follows:

def fallback_getpass(prompt='Password: ', stream=None, *, echo_char=None):
    # remove the function call
    import warnings
    warnings.warn("Can not control echo on the terminal.", GetPassWarning,
                  stacklevel=2)
    if not stream:
        stream = sys.stderr
    print("Warning: Password input may be echoed.", file=stream)
    return _raw_input(prompt, stream, echo_char=echo_char)

By the way,can we make IDLE support getpass?I think it is important for the beginners!

At last,if I say something wrong, please tell me why and forgive me, thank you!

Bắt đầu với điểm vào getpass.fallback_getpass và kiểm tra cách nó gọi _check_echo cũng như xử lý echo_char khi không thể điều khiển các thiết lập của terminal. Xác định liệu lời gọi xác thực có cần thiết trong đường dẫn fallback này hay không, và xác nhận hành vi đã chọn bằng các kiểm tra hành vi getpass liên quan.