bug#38705: 26.3; set-frame-size pixelwise makes frame larger

[martin rudalics]

> set-frame-size with PIXELWISE=t makes frame larger than specified value.
> (setq frame-resize-pixelwise t) makes no difference.
>
> (progn (set-frame-size nil 500 500 t)
>         (list (list (frame-outer-width)
>                     (frame-pixel-width)
>                     (frame-inner-width))
>               (list (frame-outer-height)
>                     (frame-pixel-height)
>                     (frame-inner-height))))
> =>((549 533 533) (595 536 536))

Right.  But here

(progn (set-frame-size nil 500 500 t)
       (list (list (frame-outer-width)
                   (frame-pixel-width)
                   (frame-inner-width)
                   (frame-text-width))
             (list (frame-outer-height)
                   (frame-pixel-height)
                   (frame-inner-height)
                   (frame-text-height))))
=>((540 532 532 500) (583 536 536 500))

This is because 'set-frame-size' sets "the size of the text area of
FRAME" and the size of the text area is returned by 'frame-text-width'
and 'frame-text-height'.  Just another Emacs idiosyncrasy ...

martin