Highlighting across multiple code chunks in a Quarto revealjs presentation

multiple-chunks-highlight-revealjs.qmd

---
format: 
  revealjs:
    highlight-style: a11y-dark
execute:
  echo: true
---

```{r}
#| code-line-numbers: "|1|2"

1 + 
  1
```

<br>

::: {.fragment}
```{r}
#| code-line-numbers: "|1|2"

2 + 
  2
```
:::

<br>

::: {.fragment}
```{r}
#| code-line-numbers: "|1|2"

3 + 
  3
```
:::