Have to use augroup to customize highlight groups

[sainnhe]

Is your feature request related to a problem? Please describe.

Commit 282e18e added support for custom highlight groups, I'm trying to make my color scheme support this plugin.

However, I have to use augroup to get it work, see this commit.

I think using augroup is not a good solution, the custom hi groups should be placed in colors/colorscheme.vim. My color scheme supports some other enhanced syntax highlighting plugins such as chromatica, vim-lsp-cxx-highlight and semshi, they don't need an augroup and just work if I place the code in colors/colorscheme.vim.

Describe the solution you'd like

The code for custom highlight groups should work when I place them in colors/colorscheme.vim without an augroup.

Describe alternatives you've considered

Additional context

To reproduce it, edit the color scheme you are using in your init.vim. Restart nvim, and the custom hi groups won't be applied.

[vigoux]

Could you try #121, it solved the issue on my side, but having you testing it will give use more confidence in it 😉

[sainnhe]

Yeah, I can confirm that it can be fixed. Thank you!