Improve guard so it works for no eof new line

ftplugin/terraform.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'terraform') == -1
+
 " terraform.vim - basic vim/terraform integration
 " Maintainer: HashiVim <https://github.com/hashivim>
 
@@ -60,4 +61,5 @@ endif
 
 let &cpoptions = s:cpo_save
 unlet s:cpo_save
+
 endif