patch 8.0.0616: not always setting 'background' correctly after :hi Normal commit https://github.com/vim/vim/commit/1615b36b91b094263240d7b555283ddf33208f62 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 4 21:06:09 2017 +0200 patch 8.0.0616: not always setting 'background' correctly after :hi Normal Problem: When setting the cterm background with ":hi Normal" the value of 'background' may be set wrongly. Solution: Check that the color is less than 16. Don't set 'background' when it was set explicitly. (Lemonboy, closes #1710)