Improve guard so it works for no eof new line

syntax/reason.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'reason') == -1
+
 " Vim syntax file
 " Language:     Reason (Forked from Rust)
 " Maintainer:   (Jordan - for Reason changes) Patrick Walton <pcwalton@mozilla.com>
@@ -249,4 +250,5 @@ syn sync minlines=200
 syn sync maxlines=500
 
 let b:current_syntax = "rust"
+
 endif