Quarto Outline shows commented-out headings

System details:

Positron and OS details:

Positron Version: 2026.08.0 build 331
Code - OSS Version: 1.124.0
Commit: a3a370d4187484ce962794408c76dab702978eaf
Date: 2026-08-05T17:02:37-07:00
Electron: 42.2.0
Chromium: 148.0.7778.97
Node.js: 24.15.0
V8: 14.8.178.14-electron.0
OS: Linux x64 7.1.4-204.fc44.x86_64

Describe the issue:

Headings that have been commented out (with a multi-line <!-- -->) are shown in the Positron Outline.

Steps to reproduce the issue:

1. Open the following .qmd file:

---
title: "Untitled"
format: html
---

# Heading 1

<!-- TBD.

# Heading 2

TBD. -->

# Heading 3

TBD.

2. See Outline:

(Note that if the comment starts in the heading (<!-- # Heading 2), then the latter is correctly omitted from the outline.)

Expected or desired behavior:

Such headings should be omitted from the Positron Outline. That's the case in RStudio.

Many thanks in advance!

Reproduce the issue by opening the reported .qmd example in Positron and inspecting the Outline. The work is done when the heading inside the multiline comment is omitted while Heading 1 and Heading 3 remain visible, matching the expected behavior described in the issue.