On Sun, Apr 21, 2019 at 7:38 PM Noam Postavsky <npostavs@gmail.com> wrote:

>                (insert-before-markers string) ; <------------ change here
>

OK, since I now have a workaround, or rather the appropriate code to use in
my situation, the bug is resolved from my perspective.

Perhaps the "Process Filter Functions" manual page could stand to be
touched up a bit, though.