[Python 3.13.5] Upgrade Cleanup & Fixes#4100

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BethanyG merged 3 commits intoexercism:mainfrom

BethanyG:upgrade-cleanup-and-fixes

Feb 25, 2026

Commits on Feb 25, 2026

Small fixes in code examples and explainations from forum, messages, and review.
BethanyG
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Small fixes and corrections from forum, gh issues and code reviews.
BethanyG
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Bumped version to ubuntu-24.04 in CI for canonical_sync tests.
BethanyG
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