gh-119205: Fix autocompletion bug in new repl

[koxudaxi]

If the interpreter shows a warning, the new repl prompt cursor moves after the warning.

• Issue: Warning on autocomplete messes up the terminal #119205

[ghost]

All commit authors signed the Contributor License Agreement.

[bedevere-app]

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[bedevere-app]

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[lysnikolaou]

@koxudaxi Can you please rebase onto main and move the tests to the newly created test_pyrepl directory?

[lysnikolaou]

LGTM! 🎉

[bedevere-app]

Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

[koxudaxi]

@ambv@lysnikolaou
Thank you for reviewing and rebasing my PR.
I apologize I was moving to Pittsburgh airport from the conference center.

[ambv]

@koxudaxi let the tests complete, don't rebase unless there are conflicts.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Debian root 3.x has failed when building commit 506b1a3.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/345/builds/8076) and take a look at the build logs.
4. Check if the failure is related to this commit (506b1a3) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/345/builds/8076

Summary of the results of the build (if available):

Click to see traceback logs

Note: switching to '506b1a3ff66a41c72d205c8e4cba574e439d8e76'. You are in 'detached HEAD' state. You can look around, make experimental changes and commit them, and you can discard any commits you make in this state without impacting any branches by switching back to a branch. If you want to create a new branch to retain commits you create, you may do so (now or later) by using -c with the switch command. Example: git switch -c <new-branch-name> Or undo this operation with: git switch - Turn off this advice by setting config variable advice.detachedHead to false HEAD is now at 506b1a3ff6 gh-119205: Fix autocompletion bug in new repl (#119229) Switched to and reset branch 'main' configure: WARNING: no system libmpdecimal found; falling back to bundled libmpdecimal (deprecated and scheduled for removal in Python 3.15)configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.make: *** wait: No child processes. Stop.make: *** Waiting for unfinished jobs....make: *** wait: No child processes. Stop. Cannot open file '/root/buildarea/3.x.angelico-debian-amd64/build/test-results.xml' for upload

[ambv]

The buildbot failure is an unrelated timeout:

command timed out: 1800 seconds without output running [b'make', b'buildbottest', b'TESTOPTS=-j2 --junit-xml test-results.xml ${BUILDBOT_TESTOPTS}', b'TESTPYTHONOPTS=', b'TESTTIMEOUT=1200'], attempting to kill 

[miss-islington-app]

Thanks @koxudaxi for the PR, and @ambv for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖 I'm not a witch! I'm not a witch!

[bedevere-app]

GH-119407 is a backport of this pull request to the 3.13 branch.