Python 3.13: Pressing the Tab key while in the REPL prints 4 spaces instead of 1 tab (breaking backspace)

Bug report

Bug description:

Tested on 3.12:
In the <=3.12 Python REPL on Linux, I can press the tab key, and a tab character is printed in the console. I can then use the backspace key to undo that whole tab character.

Tested on 3.13:
In the 3.13 Python REPL on Linux, if I type a tab character, it seems to convert it to 4 spaces, and thus pressing the backspace key once only deletes 1/4 of the indentation.

This is either a bug, or if it's a feature, it should be configurable and without changing the sane defaults from <=3.12.
How can I get back to the <=3.12 behaviour?

CPython versions tested on:

3.12, 3.13

Operating systems tested on:

Linux, macOS

首先，在 Linux 或 macOS 上的 Python 3.12 和 3.13 REPL 中复现 Tab 和 backspace 的行为，并比较报告中的缩进处理方式。跟踪负责转换 Tab 输入的 REPL 输入路径，然后验证解析出的行为是否与 <=3.12 的行为一致，或是否提供了所请求的配置。