[css-animations] Behavior when keyframe identifier is duplicated in animation-name

[ChumpChief]

Spec: https://drafts.csswg.org/css-animations-1/#animation-name

Chrome and Firefox both support duplicate usage of a keyframe identifier in animation-name, while Edge does not (uses the last in the list instead). We've seen a handful of sites relying on this behavior to perform multiple "iterations" with varying durations and/or delays.

Example of this pattern:
https://jsfiddle.net/435c36qL/

It would be good to clarify this behavior in the spec. Particularly since the last resolution I could find on this subject seemed to resolve the opposite -- that only the last should apply:
http://lists.w3.org/Archives/Public/www-style/2012Nov/0261.html

An added statement to the animation-name section along these lines would help I think:
"Multiple occurrences of the same keyframe name are allowed, and each defines a separate animation."

[birtles]

I thought I clarified this in cd78f11 (issue #69)? Is something still missing from that?

[ChumpChief]

Ah nope, that looks good. I had just been looking under the animation-name section and missed it :)