Bug: Blockquotes Inject Quote Characters Into Strange Places

### Describe your issue

While running some Markdown compatibility tests using the [classic MDTest](https://github.com/michelf/mdtest/blob/master/Markdown.mdtest/Blockquotes%20with%20code%20blocks.text) I noticed that Haptic generates output with additional quote characters in strange places.

What I assume happened here is that Haptic is looking for the last bit of text in a blockquote and appending the character. Not sure if this is happening at the CSS level or not.

I have written CSS for Obsidian which places large decorate quotes at the top and bottom of blockquotes, becoming a design element rather than an inline character. Something like that might suit Haptic if it wants to add quotes without additional logic. Many other editors don't add quotes at all, perhaps for this reason.

### Steps to reproduce

1. Open `Blockquotes with code blocks.text` in Haptic.
2. Observe stray quote characters.

### What was the expected result?

No stray quote characters.

### Put here any screenshots or videos (optional)


### Would you like to work on this issue?

None