patch 8.1.0614: placing signs can be complicated commit https://github.com/vim/vim/commit/162b71479bd4dcdb3a2ef9198a1444f6f99e6843 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Dec 21 15:17:36 2018 +0100 patch 8.1.0614: placing signs can be complicated Problem: Placing signs can be complicated. Solution: Add functions for defining and placing signs. Introduce a group name to avoid different plugins using the same signs. (Yegappan Lakshmanan, closes #3652)

" 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