patch 8.1.2293: join adds trailing space when second line is empty Commit: https://github.com/vim/vim/commit/cc184cfb09161b3bbc7d5d8859a18e812367d19c Author: Bram Moolenaar <Bram@vim.org> Date: Tue Nov 12 20:31:20 2019 +0100 patch 8.1.2293: join adds trailing space when second line is empty Problem: Join adds trailing space when second line is empty. (Brennan Vincent) Solution: Do not add a trailing space.

" 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