check_colors: tweak check for t_Co and add missing highlight groups.

vim / colorschemes

colorschemes for Vim

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check_colors: tweak check for t_Co and add missing highlight groups. #245

Open lifepillar opened 1 year ago

lifepillar commented 1 year ago

In Vim 9 script, &t_Co cannot be directly compared with a number because it has type string. You must do, e.g., str2nr(&t_Co) > 256. The parentheses prevent check_colors.vim to detect the comparison. This PR fixes that.

This PR also adds a couple of missing highlight groups.