patch 8.0.0351: no test for concatenating an empty string commit https://github.com/vim/vim/commit/218426896cbb2129aa4e85803ea97c5b57df1eaa Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 23 13:50:38 2017 +0100 patch 8.0.0351: no test for concatenating an empty string Problem: No test for concatenating an empty string that results from out of bounds indexing. Solution: Add a simple test.

" VIM syntax file
" Language:	groff
" Maintainer:	Alejandro López-Valencia <dradul@yahoo.com>
" URL:		http://dradul.tripod.com/vim
" Last Change:	2003-05-08-12:41:13 GMT-5.

" This uses the nroff.vim syntax file.
let b:main_syntax = "nroff"
let b:nroff_is_groff = 1
runtime! syntax/nroff.vim