How to determine what face is associated with a bit of text?

[Sean MacLennan]

On Thu, 10 Apr 2008 13:44:08 +0900
"Stephen J. Turnbull" <stephen at xemacs.org> wrote:

> What do you mean by "collapsed line number"?

I use the hide-copyleft function a lot to, well, hide the copyleft (or
right) that is at the top of a lot of the source files I edit. When I
call what-line, it gives me something like:

    Collapsed line 707; Buffer line 720

Cheers,
   Sean