patch 8.2.0833: mapping <C-bslash> doesn't work in the GUI Commit: https://github.com/vim/vim/commit/ca5bc746073b6fd4b7651bc02f7a18b1b43bd4ca Author: Bram Moolenaar <Bram@vim.org> Date: Wed May 27 22:08:34 2020 +0200 patch 8.2.0833: mapping <C-bslash> doesn't work in the GUI Problem: Mapping <C-bslash> doesn't work in the GUI. Solution: Reset seenModifyOtherKeys when starting the GUI. (closes https://github.com/vim/vim/issues/6150)

" Vim filetype plugin file
" Language:             XFree86 Configuration File
" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
" Latest Revision:      2008-07-09

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

let s:cpo_save = &cpo
set cpo&vim

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

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

let &cpo = s:cpo_save
unlet s:cpo_save