Document weird behaviour in gitcommit files

after/ftplugin/gitcommit.vim

@@ -3,6 +3,8 @@ if !has("win32") || has("gui_running")
   setlocal spell
 endif
 
+" TODO: Auto-wrap doesn't work properly with the list format pattern
+
 " Set up format options
 "   t - Auto-wrap text using textwidth
 "   n - When formatting text, recognize numbered lists