Joffrey JAFFEUX b3ecf00c98
DEV: adds initial support for custom blocks using code fencing (#15743)
Allows to write custom code blocks:

```
   ```mermaid height=200,foo=bar
   test
   ```
```

Which will then get converted to:

```
<pre data-code-wrap="mermaid" data-code-height="200" data-code-foo="bar">
  <code class="lang-nohighlight">
    test
  </code>
</pre>
```
2022-02-09 11:23:44 +01:00
..