Improve guard so it works for no eof new line

ftplugin/ember-script.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'emberscript') == -1
+
 " Language:    ember-script
 " Maintainer:  Yulij Andreevich Lesov <yalesov@gmail.com>>
 " URL:         http://github.com/yalesov/vim-ember-script
@@ -20,4 +21,5 @@ else
 endif
 setlocal comments=:#
 setlocal commentstring=#\ %s
+
 endif