[css-values] Double bar with duplicate values #710
Description
https://drafts.csswg.org/css-values-4/#comb-any states:
A double bar (||) separates two or more options: one or more of them must occur, in any order.
So, if you have the syntax a || b then the following constructions are valid:
a
b
a b
b a
Does the "them" in "one or more of them" refer to the values or instances of values? Or, more concretely, is the following valid:
a a b
The spec could be clearer on this point.