Fix a potential variable misuse bug

[LostBenjamin]

Hi,

This pull request is a fix to a potential variable misuse bug at Lib/test/test_functools.py. Please check the changes.

Best,
Jingxuan

[ghost]

All commit authors signed the Contributor License Agreement.

[bedevere-bot]

Most changes to Python require a NEWS entry.

Please add it using the blurb_it web app or the blurb command-line tool.

[CharlieZhao95]

Maybe you could read the Python Developer's Guide first to make sure your PR is formatted correctly. The doc will also tell you how to sign the CLA.

[LostBenjamin]

This PR only changes one line of code. No format is better than taking a brief look at the changed line.

I tried to sign the CLA for multiple times. However, whenever I clicked SIGN IN WITH GITHUB TO AGREE, it shows Thank you for authorizing our application, but the CLA must be signed by the users who contributed to the PR. Authors emails are: LostBenjamin@users.noreply.github.com..

[hauntsaninja]

Thanks for spotting this! Can you reauthor the commit using the email ID you signed the CLA with?

[LostBenjamin]

@hauntsaninja Done.