Extra space on indented lists

Hello! Love the windmill theme.

One bug I noticed:
In Markdown, I type:
```
- list
- a
- b
- next list
- c
```

When rendered into my wiki, there is more space between `- list` and `- a` than there is between `- b` and `- next list`. Which doesn't seem right. It throws off the look when you are trying to show organization and the separation (if any) should be between `- b` and `- next list`.

Start by rendering the nested-list Markdown shown in the issue with the windmill theme, then inspect the theme's list-spacing styles. Compare the gap between the parent and nested items with the gap between the nested list and the next top-level item; done means the spacing matches the described hierarchy.

Written by the indexing model from the issue text.