### Bug description

Hello,

I'm currently using the version `1.3.290`.

I've got a small but specific problem with the code annotation for annotating [VHDL](https://en.wikipedia.org/wiki/VHDL) code. It doesn't seem to detect the `-- <x>`-Snippet and therefore doesn't correctly generate the annotation in the PDF.

````md
---
format: pdf
---

```vhdl
type state is (S0, S1, S2);
signal c_st, n_st : state;

p_seq: process (rst, clk) -- <1>
begin
  ...
end process;

p_com: process (i, c_st) -- <2>
begin
  ...
end process;
```
1. [*Memorizing*]{.underline}
2. [*Memoryless*]{.underline}
````

**Note**: `--` is used for comments in VHDL

## `quarto check`

```cmd
[>] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.1: OK
      Dart Sass version 1.55.0: OK
[>] Checking versions of quarto dependencies......OK
[>] Checking Quarto installation......OK
      Version: 1.3.290
      Path: C:\Users\Joel\AppData\Local\Programs\Quarto\bin
      CodePage: 1252

[>] Checking basic markdown render....OK

[>] Checking Python 3 installation....OK
      Version: 3.10.5
      Path: C:/Users/Joel/AppData/Local/Programs/Python/Python310/python.exe
      Jupyter: 5.1.1
      Kernels: python3

[>] Checking Jupyter engine render....OK

[>] Checking R installation...........OK
      Version: 4.2.2
      Path: C:/PROGRA~1/R/R-42~1.2
      LibPaths:
        - C:/Users/Joel/AppData/Local/R/win-library/4.2
        - C:/Program Files/R/R-4.2.2/library
      knitr: 1.41
      rmarkdown: 2.20

[>] Checking Knitr engine render......OK
```

### Checklist

- [X] Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [X] Please [format your issue](https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us) so it is easier for us to read the bug report.
- [ ] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [ ] Please document the operating system you're running. If on Linux, please provide the specific distribution.
- [X] Please provide the output of `quarto check` so we know which version of quarto and its dependencies you're running.
dragonstyle
2023-03-26T19:22:53Z
joelvonrotz
bug
v1.3
closed
Code Annotation for VHDL doesn't work
https://github.com/quarto-dev/quarto-cli/issues/4974