Gah!
I see what you mean. They were not like this at one point, now they are. Thanks for pointing it out. I will get right on it.
Hmmm, sort of odd. I resubmitted the first section and all the offending characters were gone. When I resubmitted the second section, The Setup, the offending characters were back.
It seems that what is not liked is '& nbsp;' (no space between & and nbsp;) which is used in HTML for padding spaces. I will figure a way to scrub this out of the submission.
Scrubbing done. Still seems sort of odd. Is there a character or string of characters we use on this site for a non-breaking space?