[css3-syntax] More changes from CSS 2.1 Core Grammar

Hi,

If I’m reading the CSS 2.1 Core Grammar correctly, the ED has a few 
changes from it that are not noted in section 3.6.

Overall, tehy are all boring details. I’m only writing them up for 
completeness.

* [] blocks, () blocks and functions can now contain {} blocks, 
at-keywords or semicolons
* Property values, functions and all blocks can now contain cdo and cdc
* Selectors can now contain semicolons
* Selectors and at-rule predules can now contain cdo, cdc and at-keywords
* Anything can contain an unmatched } ] or )
* Selectors are no longer optional in rulesets a.k.a. style rules. 
(Although an empty selector is invalid per css3-selectors, it does not 
make ruleset invalid per the core grammar.)

(Note: this is with the "preserved token" definition in the current ED.)


I think that the core grammar is more restrictive than it needs to be 
(especially the 'any' production). I don’t know if lifting those 
restrictions was intentional.

-- 
Simon Sapin