试试使用<br>.参考这个网址 的Skip a line章节。
```
---
title: "Untitled"
author: ""
date: "2021/5/20"
output: html_document
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
```{r}
a = 'just a useless character'
```
fuck fuck fuck fuck fuck fuck fuck fuck fuck
fuck fuck fuck fuck fuck fuck fuck fuck fuck
fuck fuck fuck fuck fuck fuck fuck fuck fuck
```{r}
a = 'just a useless character'
```
<br><br><br><br>
every single `<br>` is a new line.
fuck fuck fuck fuck fuck fuck fuck fuck fuck
fuck fuck fuck fuck fuck fuck fuck fuck fuck
fuck fuck fuck fuck fuck fuck fuck fuck fuck
```
