[CSS21][css3-fonts] computed value of 'font-weight'

The "Computed value:" line in
http://www.w3.org/TR/CSS21/fonts.html#propdef-font-weight says "see
text", but nothing in the text explicitly says how to find the
computed value.  (I think it used to, but the section that did was
thankfully removed.)

I believe that the computed value for 'font-weight' should be
described as a number in 100, 200, 300, ... 900, such that:
 * normal computes to 400
 * bold computes to 700
 * bolder and lighter compute according to the table given in the
   prose

-David

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