patch 8.1.1744: build error without the conceal feature commit https://github.com/vim/vim/commit/07d1356648a2a9b5f07e20ff1d3c4c606ae45d49 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jul 24 18:43:08 2019 +0200 patch 8.1.1744: build error without the conceal feature Problem: Build error without the conceal feature. Solution: Define variables also without the conceal feature.

" Vim filetype plugin file
" Language:	Diff
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2005 Jul 27

" Only do this when not done yet for this buffer
if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

let b:undo_ftplugin = "setl modeline<"

" Don't use modelines in a diff, they apply to the diffed file
setlocal nomodeline