[css-counter-styles] 'infinite' vs. 'infinity'

There are multiple places in
http://dev.w3.org/csswg/css-counter-styles/ where 'infinity' is used
as a keyword value of the range descriptor, despite the valid value
of that descriptor being 'infinite'.

I believe some selective search-and-replace is needed.  (There are
some occurrences of infinity that are not keywords, and thus ok.)

-David

-- 
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                          https://www.mozilla.org/   𝄂
             Before I built a wall I'd ask to know
             What I was walling in or walling out,
             And to whom I was like to give offense.
               - Robert Frost, Mending Wall (1914)