Using the dev version, LaTex refuses to compile if a custom section format is defined in the header.

The following won't compile:

```markdown
---
title: RedeclareSectionCommand
format: pdf 
header-includes: |
        \RedeclareSectionCommand[
          beforeskip=-6pt plus 1pt minus 1pt,
          afterskip=1sp plus 1sp minus 1sp
        ]{section}
---

# Section

This is a section.
```

If the custom definition is removed, it compiles.

```markdown
---
title: RedeclareSectionCommand
format: pdf 
---

# Section

This is a section.
```


2022-04-16T05:40:32Z
juliantao
closed
[pdf]: undefined sequence for `RedeclareSectionCommand`
https://github.com/quarto-dev/quarto-cli/issues/657