Not sure what the fix is supposed to be but:
>Hello
<!-- This is a comment -->
>world!
resolves to
Hello
world!
For a neat break between quote blocks.
Apparently this is also the suggested fixalso the suggested fix as of 2012.
It looks like any non-whitespace characters will cause the markdown formatter to trigger a break, so you can use a <br/>
tag or even the
character code in place of the <!-- comment -->
html tag.