Improve guard so it works for no eof new line

syntax/gitrebase.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'git') == -1
+
 " Vim syntax file
 " Language:	git rebase --interactive
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
@@ -43,4 +44,5 @@ hi def link gitrebaseComment        Comment
 hi def link gitrebaseSquashError    Error
 
 let b:current_syntax = "gitrebase"
+
 endif