Icons within the Welcome to Livebook markdown sections do not render

[mrjoelkemp]

This is with the latest livebook main branch pulled down locally.

Current behavior

I might be wrong here (new to the sourcecode), but it seems like the inability to render html inside of markdown (it getting sanitized) (possibly related to #512) might be why the icons in the Welcome to Livebook notebook aren't rendering:

An example from the Sections section of that livebook:

Notice how it says Click on the "Book" icon () and doesn't render the book icon.

Looking at the markdown in that section, you see an attempt at rendering an <i> tag with a css class:

• Even if you change the css class to rl-booklet-fill (which is the class for the book icon), you still don't see the icon.

Looking at the rendered html, you see an <i> tag that doesn't have any css classes in it:

I'm not sure if there should be a set of approved classes to avoid stripping or if the fix is to not try to reference those icons/classes at all.

Expected behavior

Seems like we expect the icons to render when referenced within the markdown sections.

[jonatanklosko]

Missed that in #495. Good catch, thanks!