Improve guard so it works for no eof new line

syntax/systemd.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'systemd') == -1
+
 " Filename:     systemd.vim
 " Purpose:      Vim syntax file
 " Language:     systemd unit files
@@ -325,4 +326,5 @@ hi def link sdCapFlags          Identifier
 
 let b:current_syntax = "systemd"
 " vim: fdm=marker
+
 endif