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 indent file
" Language:	Mail
" Maintainer:	Bram Moolenaar
" Last Change:	2009 Jun 03

if exists("b:did_indent")
  finish
endif
let b:did_indent = 1

" What works best is auto-indenting, disable other indenting.
" For formatting see the ftplugin.
setlocal autoindent nosmartindent nocindent indentexpr=