[Bug]: a list with a code-block inside of the list get messed up by a space before the list

[individual-it]

Is there an existing issue for this?

• [X] I have searched for an existing issue

Describe the bug

If a presentation contains a list with multiline codeblocks inside of the list but there is a space in an empty line before the list, it get seperated

Steps To Reproduce

see the output of this presentation:

1. point one

a=a+b;
```

2. point two

   a=a+b;

!Note that there is a single space in the first empty line!

Expected Behavior

one list (ol element) should be generated

Actual Behavior

two ol elements are generated:

<ol>
<li>point one</li>
</ol>
<pre class="code-wrapper"><code class="hljs language-ini" data-highlighted="yes"><span class="hljs-attr">a</span>=a+b<span class="hljs-comment">;</span></code></pre><ol start="2">
<li>point two</li>
</ol>
<pre class="code-wrapper"><code class="hljs language-ini" data-highlighted="yes"><span class="hljs-attr">a</span>=a+b<span class="hljs-comment">;</span></code></pre>

### Examples, Code Samples, or Screenshots

deleting that single space fixes it:

1. point one

   a=a+b;

2. point two

   a=a+b;

Environment

- **OS**: Ubuntu 22.04
- **ownCloud Web**: ownCloud Web UI 8.0.0
- **oCIS**: Infinite Scale 5.0.0-RC4

What browsers are you seeing the problem on?

Firefox

[saw-jan]

Expected	Actual

[saw-jan]

marked library rendered the correct elements. It looks like the revealjs library does something that changes the parsed elements.