The light scheme doesn't reflect difference in vimdiff

[huangzonghao]

This is when the cursor is off the line.

This is when the cursor is on the line.

The difference of the line is completely gone.

[NLKNguyen]

Ah yes, I noticed this issue too. It's the same issue for both dark & light. Unfortunately I'm not aware of any way to get around this because once the cursor line background is enabled, it takes precedence no matter what.

[MaxG87]

I noticed that the colour scheme gruvbox as well as some of the builtin schemes, e.g. blue and default, do not suffer from this problem.

[MaxG87]

Analogous to #147, vimdiff colours work out well for Vim 8.2 and NeoVim 0.3.8.