Improve guard so it works for no eof new line

syntax/moon.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'moonscript') == -1
+
 " Language:    MoonScript
 " Maintainer:  leafo <leafot@gmail.com>
 " Based On:    CoffeeScript by Mick Koch <kchmck@gmail.com>
@@ -316,4 +317,5 @@ syn cluster moonAll contains=moonStatement,moonRepeat,moonConditional,
 if !exists('b:current_syntax')
   let b:current_syntax = 'moon'
 endif
+
 endif