Improve guard so it works for no eof new line

compiler/coffee.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'coffee-script') == -1
+
 " Language:    CoffeeScript
 " Maintainer:  Mick Koch <mick@kochm.co>
 " URL:         http://github.com/kchmck/vim-coffee-script
@@ -81,4 +82,5 @@ augroup CoffeeUpdateMakePrg
     autocmd BufWritePre,BufFilePost          call s:UpdateMakePrg()
   endif
 augroup END
+
 endif