Meta shortcode doesn't preserve line breaks in values #14061
Description
I have:
- searched the issue tracker for similar issues
- installed the latest version of Quarto CLI
- formatted my issue following the Bug Reports guide
Bug description
Line breaks in a value that is used with the meta shortcode are not preserved
Steps to reproduce
---
key: |
Something with a line break
I want to preserve.
---
``` yaml
{{< meta key >}}
```
Actual behavior
Output consistent with:
``` yaml
Something with a line break I want to preserve.
```Expected behavior
Output consistent with:
``` yaml
Something with a line break
I want to preserve.
```Your environment
- OS Mac Tahoe 26.3
Quarto check output
Quarto 1.9.21
[✓] Checking environment information...
Quarto cache location: /Users/charlottewickham/Library/Caches/quarto
[✓] Checking versions of quarto binary dependencies...
Pandoc version 3.8.3: OK
Dart Sass version 1.87.0: OK
Deno version 2.4.5: OK
Typst version 0.14.2: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
Version: 1.9.21
Path: /Applications/quarto/bin
[✓] Checking tools....................OK
TinyTeX: v2025.12
Chromium: (not installed)
Chrome Headless Shell: (not installed)
VeraPDF: (not installed)
[✓] Checking LaTeX....................OK
Using: TinyTex
Path: /Users/charlottewickham/Library/TinyTeX/bin/universal-darwin
Version: 2025
[✓] Checking Chrome Headless....................OK
Using: Chrome found on system
Path: /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
Source: MacOS known location
[✓] Checking basic markdown render....OK
[✓] Checking R installation...........OK
Version: 4.5.1
Path: /Library/Frameworks/R.framework/Resources
LibPaths:
- /Users/charlottewickham/Library/R/arm64/4.5/library
- /Library/Frameworks/R.framework/Versions/4.5-arm64/Resources/library
knitr: 1.50
rmarkdown: 2.29
[✓] Checking Knitr engine render......OK
[✓] Checking Python 3 installation....OK
Version: 3.13.2
Path: /Users/charlottewickham/.local/share/uv/python/cpython-3.13.2-macos-aarch64-none/bin/python
Jupyter: (None)
Jupyter is not available in this Python installation.
Install with python3 -m pip install jupyter
[✓] Checking Julia installation...