patch 8.2.3270: prop_find() finds property with ID -2 Commit: https://github.com/vim/vim/commit/0d4d9ee9bb18f89d76c67f037baebe2c2db545f0 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 1 19:28:15 2021 +0200 patch 8.2.3270: prop_find() finds property with ID -2 Problem: prop_find() finds property with ID -2. Solution: Use a separate flag to indicate an ID was specified. (issue https://github.com/vim/vim/issues/8674)

" Vim filetype plugin file
" Language:	Diff
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2020 Jul 18

" 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

" If there are comments they start with #
let &commentstring = "# %s"