bug#29348: 26.0.50; shr.el heisenbug

[Eli Zaretskii]

> From: Devon Sean McCullough <Emacs-Hacker2017@jovi.net>
> Date: Sat, 18 Nov 2017 02:19:29 -0500
> 
> Given the same input `shr-render-buffer' and `shr-render-region'
> scramble their output about 25% of the time.  Here's a fix:

Can you tell more about this "scrambling"?  I don't understand what
that means.  An example where that happens would also be useful.

Thanks.