gh-92546: Fix _perfcheck in pprint.py

[kj7rrv]

Closes #92546

• Issue: Minor bug in pprint module #92546

[ghost]

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[arhadthedev]

I tried to do the same fix in gh-92560. Currently it stuck on determination whether developer-only tools should be tested, so I'm porting this function to python/pyperformance (pprint branch of my fork - I can't create a PR until I fix some bugs).

[kj7rrv]

@arhadthedev should I close this?

[arhadthedev]

@kj7rrv I would wait until a triager or a core developer walks by. Maybe your PR will be accepted so I'll close mine.

[kj7rrv]

@arhadthedev Oh, okay. I'll leave it.

[kj7rrv]

How long do the tests generally take?

[arhadthedev]

The port is done: python/pyperformance#222. You can track it to close your PR after/if it's merged.

[kj7rrv]

So I should change this PR to remove _perfcheck instead of fixing the bug? @arhadthedev

[kj7rrv]

Superseded by gh-94613