gh-123228: don't leak file descriptors in pyrepl test

[cfbolz]

if no f_in and f_out arguments are given, _ReadlineWrapper calls os.dup on fd 0 and 1. Instead, just pass None, because the fds aren't needed anyway in this test.

• Issue: _pyrepl.readline._ReadlineWrapper.get_line_buffer should return a str, not a bytes object #123228

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @hauntsaninja for commit 20eb346 🤖

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @hauntsaninja for commit 20eb346 🤖

If you want to schedule another build, you need to add the 🔨 test-with-refleak-buildbots label again.

[cfbolz]

ok, the refleak builds worked, the failures look unrelated. @hauntsaninja, I don't know what the usual approach is in such a situation? the commit definitely improves the buildbot situation.

[pablogsal]

ok, the refleak builds worked, the failures look unrelated. @hauntsaninja, I don't know what the usual approach is in such a situation? the commit definitely improves the buildbot situation.

Let's land it and back port it

[miss-islington-app]

Thanks @cfbolz for the PR, and @pablogsal for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

[bedevere-app]

GH-123313 is a backport of this pull request to the 3.13 branch.

[cfbolz]

@pablogsal thank you!