[css-text-decor-3] z-ordering of text-emphasis marks

http://dev.w3.org/csswg/css-text-decor-3/#emphasis-marks should
specify the z-ordering of emphasis marks relative to text.

I would guess that they ought to be drawn very close in z-order to
the text itself -- probably between the text and its decorations.

-David

-- 
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                           http://www.mozilla.org/   𝄂