[dom] Add a validation step when a new DOMTokenList is created (#107)

Closes https://github.com/whatwg/dom/issues/106

@annevk - I added a validation step to the DOMTokenList creation. Can you take a look?
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/dom/pull/107

-- Commit Summary --

  * Add a validation step when a new DOMTokenList is created

-- File Changes --

    M dom.bs (6)
    M dom.html (4)

-- Patch Links --

https://github.com/whatwg/dom/pull/107.patch
https://github.com/whatwg/dom/pull/107.diff

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/dom/pull/107