HareInWeed

I think #210 might fix the issue, but it causes more problem. With some experiments, I found that layouts will be messed up if I enable the `high-dpi` feature and...

According to the document, [`many0`](https://docs.rs/nom/7.1.0/nom/multi/fn.many0.html) and [`many1`](https://docs.rs/nom/7.1.0/nom/multi/fn.many0.html) will return an error if the parser passed to the combinator accepts empty inputs. So the `many0` here parses `"abab"` into `vec!["ab", "ab"]`...