Comment from Max Vujovic <mvujovic@adobe.com>

(6)
Section 3.1.1.
Text: "Inline flow content can wrap on the start edge of the exclusion
area but must leave the area to end edge of the exclusion area empty."
Fix:

I think an explicit definition of "start edge", "end edge", "top of the
exclusion", and "bottom of the exclusion" might be helpful for
completeness. They become clear from the examples, but it might be nice to
spell it out.

Also, mixing "start" and "end" with "top" and "bottom" in the section
might be a little strange? I think of "start, end, before, after" as the
logical dimensions, dependent on writing-mode, and "left right top bottom"
as the physical dimensions, independent of writing-mode. So, "start edge"
would equal "top of the exclusion" for a top to bottom vertical writing
mode.