Dale Mellor <debian-bugs-ffbwxg@rdmp.org> writes:

> Note that many of the previous comments are off the mark; it doesn't
> matter what characters make up the end marker, it is simply the
> presence of '-' at the start of the opening marker which triggers the 
> problem.

I can't reproduce this.  The previous comments seem correct to me.  See
attached (produced with 26.3).