Yeah this is VERY tough, probably difficulty level 20.
When you get stuff from the selection we are getting straight HTML
<ul>
<li>some text</li>
</ul>
Nothing here about * vs +
To add complication if you just select a couple of items from a long list you get:
<li>some text</li>
<li>some other text</li>
This does not even give you ul vs ol
What we do for quoting is go
HTML → Markdown
This is a lossy process and also bug prone process. We have a bunch of workarounds to clean up HTML prior to conversion.
Changing to:
HTML → Original Markdown, would require a reverse map of HTML row/column → markdown. This is not supported at the moment in markdown.it.