Improve guard so it works for no eof new line

autoload/go/config.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'go') == -1
+
 " don't spam the user when Vim is started in Vi compatibility mode
 let s:cpo_save = &cpo
 set cpo&vim
@@ -491,4 +492,5 @@ let &cpo = s:cpo_save
 unlet s:cpo_save
 
 " vim: sw=2 ts=2 et
+
 endif