Improve guard so it works for no eof new line

syntax/less.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'less') == -1
+
 if exists("b:current_syntax")
   finish
 endif
@@ -63,4 +64,5 @@ hi def link lessNestedProperty Type
 hi def link lessClass PreProc
 
 let b:current_syntax = "less"
+
 endif