patch 8.0.1042: without the syntax feature highlighting doesn't work commit https://github.com/vim/vim/commit/9f45ccd1bf2d2de979d252fdd7e5c9eb3fa6cceb Author: Bram Moolenaar <Bram@vim.org> Date: Sat Sep 2 20:40:35 2017 +0200 patch 8.0.1042: without the syntax feature highlighting doesn't work Problem: Without the syntax feature highlighting doesn't work. Solution: Always use unsigned short to store attributes.

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refer to the Farsi help file by typing ":help farsi" in Vim.