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

[Lars Ingebrigtsen]

With the following HTML, on this laptop with whatever font Emacs is
using right now, 80 characters wide, the following is one pixel too
wide:

<P>A young Quakers group in Nottingham, England released this 30-minute podcast 
of a silent meeting, complete with the ambient room sounds. John Cage would be 
proud. From <a 
href="https://www.theguardian.com/media/2018/apr/08/an-oasis-of-calm-quaker-groups-30-minutes-of-silence-podcast";>The
 Guardian</a>:

The "m" in "room" extends too far.

I'm just posting this here to remind me to fix it; it'll be difficult
for anybody else to reproduce exactly.


In GNU Emacs 27.0.50 (build 7, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
 of 2018-04-15 built on corrigan
Repository revision: 1c16fbd1b281a46b07028ca78dbaab9a0ec6fd2f
Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description: Debian GNU/Linux 9 (stretch)


-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no