I've found that vim syntax file (runtime/syntax/vim.vim) doesn't know about some options of :command -complete=. For example, it highlights "color" in the line below as an error: command -nargs=1 -complete=color ...
Please consider updating the list of keywords in it on line 206 to: augroup buffer color command compiler cscope dir environment event expression file file_in_path filetype function help highlight locale mapping menu option shellcmd sign something syntax tag tag_listfiles var (new keywords here are from help :command-completion) -- You received this message from the "vim_dev" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php