[pycodestyle] Make example error out-of-the-box (E272)

[MeGaGiGaGon]

Summary

Part of #18972

This PR makes multiple-spaces-before-keyword (E272)'s example error out-of-the-box. Since True is also a keyword, the old example raises E271 instead.

Old example

True  and False

New example

x  and y

The "Use instead" section was also updated similarly.

Test Plan

N/A, no functionality/tests affected

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.