Improve guard so it works for no eof new line

ftplugin/tsx.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'typescript') == -1
+
 " modified from mxw/vim-jsx from html.vim
 if exists("loaded_matchit") && !exists('b:tsx_match_words')
   let b:match_ignorecase = 0
@@ -10,4 +11,5 @@ if exists("loaded_matchit") && !exists('b:tsx_match_words')
 endif
 
 set suffixesadd+=.tsx
+
 endif