Markdown table broken props table styles

[ZxBing0066]

Current behavior

Write a markdown table in some case, will broken the props table styles.

Right table header style: When write a markdown table:

To reproduce

There is a demo here: https://codesandbox.io/s/crazy-drake-j7vic?file=/styleguide.config.js

1. first go to: https://j7vic.sse.codesandbox.io/#/Introduction
2. click button, then the style of props table in button will broken
3. just refresh, the style will back

Expected behavior Fix the bug

[stephenliu1944]

I also had the same problem. when use the following two methods:

|A|B|C|
|-|-|-|
|a|b|c|
|a|b|c|
// or
<table>
  <tr>
    <th>A</th>
    <th>B</th>
    <th>C</th>
  </tr>
  <tr>
    <td>a</td>
    <td>b</td>
    <td>c</td>
  </tr>  
</table>