Repro:

    ---
    title: "Untitled"
    format: html
    editor: visual
    ---
    
    
    Hello, an hr.
    
    ---
    
    Hello, another thing.
    
    ---
    
    And what about this?

`Hello, another thing` gets picked up as YAML by RStudio, and VS Code, but _not_ by our CLI:

<img width="267" alt="image" src="https://user-images.githubusercontent.com/285675/177629161-4b9d24ab-ffca-4c9c-ae21-a0bc1560dc7c.png">

cscheid
2022-07-06T19:36:48Z
cscheid
bug
1.0
closed
Don't interpret text between `---` HRs as yaml
https://github.com/quarto-dev/quarto-cli/issues/1304