commit https://github.com/vim/vim/commit/9f5842e63fc63d438cbffcec503e072a06f74dc2 Author: Bram Moolenaar <Bram@vim.org> Date: Sun May 29 16:17:08 2016 +0200 patch 7.4.1857 Problem: When a channel appends to a buffer that is 'nomodifiable' there is an error but appending is done anyway. Solution: Add the 'modifiable' option. Refuse to write to a 'nomodifiable' when the value is 1.

" Vim filetype plugin
" Language:	git config file
" Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
" Last Change:	2009 Dec 24

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

setlocal formatoptions-=t formatoptions+=croql
setlocal comments=:#,:; commentstring=;\ %s

let b:undo_ftplugin = "setl fo< com< cms<"