bug#9699: frame-auto-hide-function

[Drew Adams]

> Example: I like my diff buffers in a separate frame, so I use:
> emacs -Q --eval "(setq special-display-regexps '(\".*diff\\*\"))"
> C-x C-f /path/to/modified/file/under/vcs
> C-x v =   -> diff buffer pops up in new frame
> 
> Now using "C-x k" to kill the diff buffer iconifies the associated
> frame. It used to just delete it (which I think was better, but YMMV).

Ouch!  Someone (TM) is (still) on the wrong track...

I agree: delete, don't iconify.