[Vimoutliner] Vim 7 magic?

[Tim Roberts]

I recently upgraded to vim 7.0 on my WinXP box.  I did not install a new
version of vimoutliner -- I just kept the same old files.

Much to my surprise, when I bring up my outlines, I find that the
indentation level is now shown in a narrow column at the far left. 
That's very cool, but why is it there?  If this is a VIM 7.0 featurette,
how did the old outliner know to use it?  Or is this something that has
been there all along, but it was just disabled by default?

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.