Jiahe Jiang

Try `vim.highlight.create('BufferLineFill', { guibg = '#181c24' }, false)`

This issue may be solved by [this](https://github.com/shaunsingh/nord.nvim/commit/c8d932b46f3583f072c87204dd6fb575972053db).

I guess the reason is that the `relative_first_line` and `relative_last_line` are rounded down so the difference of them, aka the height, is unstable. It may differ 1 when window scrolls....

Thank you for this great plugin! I wonder if it is possible to add options to `Diagnostic` so that I can enable borders for the popup menu. The result may...