Improve guard so it works for no eof new line

ftplugin/elm/tagbar.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'elm') == -1
+
 if !executable('ctags')
     finish
 elseif globpath(&runtimepath, 'plugin/tagbar.vim') ==? ''
@@ -19,4 +20,5 @@ function! s:SetTagbar()
 endfunction
 
 call s:SetTagbar()
+
 endif