Require clear sections in lint UI fixtures (#62659)

Add `// --- SHOULD FIRE ---- ` and `// ---- SHOULD NOT FIRE ---- ` to
the `/lint-creator` skill.

Release Notes:

- N/A
6efd4950d6Miguel Raz Guzmán Macedo committed on 8/27/2026, 5:53:18 AM· committed by GitHubparentfe5b7ce
1 file changedLine totals unavailable