bug#28915: Emacs 27 under macOS window system; improper frame resizing (off by 4 pixels)

[martin rudalics]

> This is not a bug.  For historic reasons, the second arguments of
> ‘set-frame-width’ and ‘set-frame-height’ must specify the width and
> height of the _text area_ of the frame and not its native width and
> height.  You can rely on this to never ever change.  Section 29.3.4
> Frame Size of the Elisp manual should explain everything.

Closing this bug.

martin