[Demo] One more nit on all_equal()

[tkim602]

Fixes #8

Demo provenance

This live replay reproduces a historical open-source issue and candidate patch, then runs it through the deployed frozen PatchCheck verifier.

• Original issue: One more nit on all_equal() more-itertools/more-itertools#902
• Upstream reference fix: Reduce groupby.__next__ calls in all_equal more-itertools/more-itertools#903
• Original repository: https://github.com/more-itertools/more-itertools
• Base commit: more-itertools/more-itertools@4f4217c
• Model exposure: FT06 training example
• Frozen reference outcome: SAFE
• Candidate patch SHA-256: 24e6230b9ad489ec6bc3f146a597b0414e7e43d96e1d890bf670a06df276704a

GitHub canonicalizes unchanged hunk context when rendering the pull request diff; the base file and candidate code edit are reproduced exactly.

Selection was fixed in docs/demo-cases.json before inference. PatchCheck is advisory and does not merge or approve this patch.

[github-actions]

PatchCheck review

Model signal: LOWER
Model risk percentile: 17.1

Code-change findings

• medium: production Python changed without test-file changes (more_itertools/recipes.py)

Fingerprints

• base_sha: e24068dae7dee3e24b35b8f70bb5225d51a42bb5
• head_sha: 8b052ba9195295fb34cefe0ba284ad797929ef85

Review-priority signal only; not a safety approval.