Empty TOC element are not removed when slide is created by ---

[cderv]

---
title: "My Title"
format: revealjs
editor: source
toc: true
---

## Section 1

Slide 1 of section 1. Should show up in the TOC as a bullet point.

---

Slide 2 of section 1. Should **not** show up in the TOC as a bullet point.

## Section 2

Slide 1 of section 2. Should show up in the TOC as a bullet point.

The second slide should not be in TOC

This was supposed to be fixed in #3671 but it is incompleted because it does not handle --- as slide delimiter.

quarto-cli/src/format/reveal/format-reveal.ts

Lines 582 to 593 in a2a22e5

	const handleUntitledSlidesInToc = (doc: Document) => {
	// remove from toc all slides that have no title
	const tocEntries = Array.from(doc.querySelectorAll(
	'nav[role="doc-toc"] a[href^="#/"]',
	));
	for (const tocEntry of tocEntries) {
	const tocEntryEl = tocEntry as Element;
	if (tocEntryEl.textContent.trim() === "") {
	tocEntryEl.parentElement?.remove();
	}
	}
	};

Empty bullet point as no empty href <a> element...

<nav role="doc-toc"> 
<h2 id="toc-title">Table of contents</h2>
<ul>
<li><a href="#/section-1" id="/toc-section-1">Section 1</a></li>
<li></li>
<li><a href="#/section-2" id="/toc-section-2">Section 2</a></li>
</ul>
</nav>

I think we can check for empty textContent on the ul > li directly and remove if no text.