Improve guard so it works for no eof new line

ftplugin/gitcommit.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'git') == -1
+
 " Vim filetype plugin
 " Language:	git commit file
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
@@ -65,4 +66,5 @@ function! s:gitdiffcached(bang,gitdir,...)
   nnoremap <buffer> <silent> q :q<CR>
   setlocal buftype=nowrite nobuflisted noswapfile nomodifiable filetype=git
 endfunction
+
 endif