Fix test expectations for .gitignore comment created by Python 3.13+ venv

[hroncok]

Since Python 3.13, the .gitignore file is created by venv: https://github.com/python/cpython/pull/108125

Fixes https://github.com/pypa/virtualenv/issues/2670

Thanks for contributing, make sure you address all the checklists (for details on how see development documentation)

• [x] ran the linter to address style issues (tox -e fix)
• [x] wrote descriptive pull request text
• [x] ensured there are test(s) validating the fix
• [ ] added news fragment in docs/changelog folder
• [ ] updated/extended the documentation

[hroncok]

I converted the PR to a draft to see if I could get Python 3.13 on the CI.

[gaborbernat]

I belive the CI will run with the main config because you don't have write access. However, you can enable GH actions for your fork at https://github.com/hroncok/virtualenv and we can use that.

[hroncok]

I converted the PR to a draft to see if I could get Python 3.13 on the CI.

Let's not. I'll open a separate one to see all the errors without fixes: https://github.com/pypa/virtualenv/pull/2673

[gaborbernat]

I belive the CI will run with the main config because you don't have write access. However, you can enable GH actions for your fork at hroncok/virtualenv and we can use that.

Until you do this I cannot validate that your changes are valid because it doesn't run your PRs CI.

[hroncok]

I can rebase this on https://github.com/pypa/virtualenv/pull/2673 to demonstrate the fix, but the CI will still fail due to the other issue.

[hroncok]

To avoid a chicken and egg problem, I decided to add everything at https://github.com/pypa/virtualenv/pull/2673