### Bug description

A simple quarto file with the following lines:

````qmd
---
title: "test"
format: html
editor: visual
---

+------------------------------------+-----------------------------------------------------+
| 读，再读，反复读                     | 经验丰富的研究者通常有一份不断完善的 “文献目录”。大约五十页到一百页左右。这份文献目录集里集中了他们所在专业的核心参考文献，有了这份目录，他们才能非常熟悉自己所在专业的文献，当然，要制作这样一份目录，学生们首先要读足够多的书。|
+------------------------------------+-------------------------------------------------------+
| 写，再写，反复写                     |                                                     |
|                                    | - 写作是熟能生巧的一项技能：写得越多。写起来也就越容易。 |
|                                    | - 在写作的时候应该以出版为目的，也就是要成文，这样做的好处之一首先是可以为将来的修订带来不少便利，其次是如果有人对你的研究感兴趣的话，你也有东西可以展示给他们看。|
|                                    | - 不要扔掉你写过的东西。把它们编好日期并存放在一个“便携”文件夹里，这些材料对你来说可能会是很有用的。|
|                                    | - 做修订通常比写新东西来得容易。                        |
+------------------------------------+-------------------------------------------------------+
````

Quarto rendered as:

![image](https://user-images.githubusercontent.com/13306020/188357960-87f464cd-785b-422a-9a46-b6585dabfe90.png)

But with `rmarkdown::render()`:

![image](https://user-images.githubusercontent.com/13306020/188358023-a5f5808a-290d-419c-8357-6185dc00de6f.png)

RStudio version on Windows 11:

RStudio 2022.07.1+554 "Spotted Wakerobin" Release (7872775ebddc40635780ca1ed238934c3345c5de, 2022-07-22) for Windows
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) QtWebEngine/5.12.8 Chrome/69.0.3497.128 Safari/537.36




### 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://yihui.org/issue/#please-format-your-issue-correctly) so it is easier for us to read the bug report.
- [X] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] Please document the operating system you're running. If on Linux, please provide the specific distribution.
jjallaire
2022-09-05T04:00:49Z
psychelzh
bug
v1.2
closed
Grid table with different row lengths are not properly rendered
https://github.com/quarto-dev/quarto-cli/issues/2292