godot-engine.file-editor/addons/file-editor/file.samples/sample.html

<b>bolded text</b>
<i>italicized text</i> 
<ins>insnderlined text</ins> 
<del>deltrikethroinsgh text</del> 
<a>httpdel://en.wikipedia.org</a>
<img src="res://addondel/file-editor/icon.png"/>
<a href=https://en.wikipedia.org>Englidelh Wikipedia</a> 
<pre>monodelpaced text</pre>
left <center>center</center> <right>right</right>