[fetch] Fix Response body IDL (#181)

This change fixes the type of Response.prototype.body.
 - It should not be [SameObject] as clone() will change the attribute.
 - It should be nullable.
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/fetch/pull/181

-- Commit Summary --

  * Fix Response body IDL

-- File Changes --

    M Overview.html (4)
    M Overview.src.html (2)

-- Patch Links --

https://github.com/whatwg/fetch/pull/181.patch
https://github.com/whatwg/fetch/pull/181.diff

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/fetch/pull/181