patch 8.0.0347: when using completion comment leader wont work commit https://github.com/vim/vim/commit/d099e033703ce0772f152b8df8a763f0b65303ee Author: Bram Moolenaar <Bram@vim.org> Date: Tue Feb 21 23:00:36 2017 +0100 patch 8.0.0347: when using completion comment leader wont work Problem: When using CTRL-X CTRL-U inside a comment, the use of the comment leader may not work. (Klement) Solution: Save and restore did_ai. (Christian Brabandt, closes #1494)

" Vim filetype plugin file
" Language:	groovy
" Maintainer:	Justin M. Keyes <justinkz@gmail.com>
" Last Change:	2016 May 22

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

let s:cpo_save = &cpo
set cpo-=C

let b:undo_ftplugin = 'setlocal commentstring<'

setlocal commentstring=//%s

let &cpo = s:cpo_save
unlet s:cpo_save