fix(syntax): stop 2+ blank lines from closing nested components early

[adamdehaven]

🔗 Linked issue

#322

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

A run of 2+ consecutive blank lines inside a nested ::component body silently dropped every sibling after the blank run (or, for #slotname slots, emitted a spurious empty paragraph).

Root cause: comark_block_yaml, comark_block_shorthand, and comark_block_slots narrowed state.lineMax after matching but never restored it, unlike comark_block. Since skipEmptyLines is bounded by state.lineMax, the second blank line in a run fell through unskipped and broke the tokenizer's indent check.

• comark_block_yaml / comark_block_shorthand: removed the stray lineMax narrowing (neither rule recurses, so it served no purpose).
• comark_block_slots: save/restore lineMax around its recursive tokenize call, matching the existing pattern in comark_block.
• Verified auto-close/streaming interaction still works with the fix

📝 Checklist

• I have linked an issue or discussion.
• I have run pnpm verify and it passes.
• I have updated the documentation accordingly.

---

Note

2 pre-existing, unrelated failures in test/inline-component-roundtrip.test.ts (single-char attribute names, e.g. x, get dropped from inline components).

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[adamdehaven]

@farnabaz can you take a look at this one as well?

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commit: 62a084b

[farnabaz]

Thanks