[Bug 20104] Algorithm for DOMTokenList.add seems wrong if tokens are present multiple times in the list

https://www.w3.org/Bugs/Public/show_bug.cgi?id=20104

--- Comment #1 from Anne <annevk@annevk.nl> ---
Do we want to catch this? Is the extra validation step negligible?

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Received on Tuesday, 27 November 2012 18:43:19 UTC