[Bug][Markdown]: one-liner Quote is not parsed

### Operating System

Windows

### Compiler

qt msvc2022 64

### Compiler flags

msvc2022 64

### maddy version

1.5.0 (latest)

### Minimal Mardown example

markdown quote is not parse

### What is not working? What did you try?

my markdown is only "> abcd"
but when parsed ,the html result is nothing 
the result is "";