我自己不是 VIM 用户，所以如果这完全离谱，请原谅我。但根据我从以下VIM
Tips网站收集到的信息：

" where was an option set  
:scriptnames            : list all plugins, _vimrcs loaded (super)  
:verbose set history?   : reveals value of history and where set  
:function               : list functions  
:func SearchCompl       : List particular function