xaringan slide separator not separating slides : <p>In this example <code>xaringan</code> presentation, why are both the <code>## blank page</code> and the <code>leaflet</code> map on the same slide, given I've separated them by the new-slide separator <code>---</code> ?</p>

<pre><code>---
title: "map test"
output:
  xaringan::moon_reader:
    css: ["default"]
    nature:
      highlightLines: true
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```


## blank page

content 

--- 

leaflet page

```{r}
library(leaflet)
leaflet() %&gt;%
  addTiles()

```

---
</code></pre>

<p><a href="https://i.stack.imgur.com/AunFv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/AunFv.png" alt="enter image description here"></a></p>
