refactor(test): move task list output coverage to specs

[AbdelrahmanHafez]

Marked version: 18.0.3

Markdown flavor: GitHub Flavored Markdown

Description

re #3960 (review).

Moves basic task-list Markdown-to-HTML coverage from test/unit/marked.test.js to test/specs/new, matching the review comment above.

Kept the scope narrow after a project-wide scan. Other HTML assertions remain in unit tests because they cover API behavior.

Contributor

• Test(s) exist to ensure functionality and minimize regression (if no tests added, list tests covering this PR); or,
• no tests required for this PR.
• If submitting new feature, it has been documented in the appropriate places.

Committer

In most cases, this should be a different person than the contributor.

• CI is green (no forced merge required).
• Squash and Merge PR following conventional commit guidelines.

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[gemini-code-assist]

Code Review

This pull request migrates task list unit tests from marked.test.js to a spec-based format. It introduces new markdown and HTML spec files for tight and loose task lists while removing the equivalent unit tests from the JavaScript test suite. I have no feedback to provide.

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Project	Deployment	Actions	Updated (UTC)
marked-website	Ready	Preview, Comment	May 2, 2026 2:48pm