Improve guard so it works for no eof new line

syntax/godebugstacktrace.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'go') == -1
+
 if exists("b:current_syntax")
   finish
 endif
@@ -10,4 +11,5 @@ let b:current_syntax = "godebugoutput"
 hi def link godebugStacktrace SpecialKey
 
 " vim: sw=2 ts=2 et
+
 endif