Improve guard so it works for no eof new line

ftplugin/stylus.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'stylus') == -1
+
 " Vim filetype plugin
 " Language: Stylus
 " Maintainer: Marc Harter
@@ -62,4 +63,5 @@ let &cpo = s:save_cpo
 command! Stylus !clear; cat % | stylus
 
 " vim:set sw=2:
+
 endif