Rewrite in in vim script

[wsdjeg]

Hi, @Xuyuanp, Thanks for sharing this project, I like the idea of this project, and I want to use it in @SpaceVim. But +lua support is not always enabled in my env, so I want to rewrite it into vim script.

BTW, just see your profile, you are chinese too. feel free to join our vim group for general discussion :)

EDIT: Sorry for openning issue which is not bug report nor feature request, just can not find your email address :)

[Xuyuanp]

OK