patch 8.0.0244: making t_BE empty only has an effect before startup commit https://github.com/vim/vim/commit/d9c60648e50a82dcb85b8dffb47f6416c3d56972 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jan 27 20:03:18 2017 +0100 patch 8.0.0244: making t_BE empty only has an effect before startup Problem: When the user sets t_BE empty after startup to disable bracketed paste, this has no direct effect. Solution: When t_BE is made empty write t_BD. When t_BE is made non-empty write the new value.

" Vim filetype plugin
" Language:	Dockerfile
" Maintainer:   Honza Pokorny <http://honza.ca>
" Last Change:	2014 Aug 29

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

" Don't load another plugin for this buffer
let b:did_ftplugin = 1

let b:undo_ftplugin = "setl commentstring<"

setlocal commentstring=#\ %s