patch 9.0.1378: illegal memory access when using virtual editing Commit: https://github.com/vim/vim/commit/c99cbf8f289bdda5d4a77d7ec415850a520330ba Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 4 14:13:10 2023 +0000 patch 9.0.1378: illegal memory access when using virtual editing Problem: Illegal memory access when using virtual editing. Solution: Make sure "startspaces" is not negative.

" Vim indent file
" Language:	Mail
" Maintainer:	Bram Moolenaar
" Last Change:	2021 Sep 26

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=

let b:undo_indent = "setl ai< cin< inde< si<"