Smart quotes break for bold and italic text

[Ellpeck]

As an example, this markdown

---
author: Test Person
title: Test Book
lang: en

output: [pdf]
---

"This is some text in quotes" followed by "some more text in quotes"

"*This is some text in quotes*" followed by "*some more text in quotes*"

"This is some text in quotes" *followed by* "some more text in quotes"

generates this output, where it is clearly visible that the quotes are incorrect if the text contained in them is italics.

It's not shown in this example, but the same happens for bold text.