[whatwg] Typo on Selection API

[Hajime Morita]

Hi,
There is a typo on selection API name:

http://www.whatwg.org/specs/web-apps/current-work/#selection
>selection . collapsed(parentNode, offset)
>Replaces the selection with an empty one at the given position.
>Throws a WRONG_DOCUMENT_ERR exception if the given node is in a different document.
collapsed -> collapse.

The typo is only on the description part. It is OK for IDL.

Regards.

-- 
morita