bug#31196: 27.0.50; shr sometimes doesn't break lines as it should

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Tue, 17 Apr 2018 19:03:38 +0200
> 
> (- (window-body-width nil t)
>    (* 2 (frame-char-width))
>    (if (and (null shr-width)
>             (not (shr--have-one-fringe-p)))
>        (* (frame-char-width) 2)
>      0))
> 
> This kludge is how shr computes how many pixels the window has
> horizontally.

Why is that a kludge?