RE: [Emacs-diffs] scratch/highlight-n-windows 6da5ca1 2/2: Set `mark-active' to selected window

[Drew Adams]

> > I think there's a good chance some code out there still sets mark-active
> > to t, so we should handle this case conservatively (i.e. highlight in all
> > windows displaying this buffer).

Is the intention that the use of a non-window, non-nil value
will be deprecated at some point? 

Or is the use of a window in some way preferable/recommended?
If so, is that change in preference documented, including describing
any differences in behavior that using a window introduces?

> OK, updated to check for t as well.

Thx.