Improve guard so it works for no eof new line

syntax/slim.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'slim') == -1
+
 " Vim syntax file
 " Language: Slim
 " Maintainer: Andrew Stone <andy@stonean.com>
@@ -108,4 +109,5 @@ hi def link slimInlineTagChar             Delimiter
 hi def link slimFilter                    PreProc
 
 let b:current_syntax = "slim"
+
 endif