[fetch] add a missing space (#192)

before: ![2016-01-09 4 48 04](https://cloud.githubusercontent.com/assets/690661/12207823/34d38692-b68c-11e5-9f45-2991bdb3e80d.png)

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after: ![2016-01-09 4 48 21](https://cloud.githubusercontent.com/assets/690661/12207835/40d590d4-b68c-11e5-8578-3e74e7e81fe9.png)

You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/fetch/pull/192

-- Commit Summary --

  * add a missing space

-- File Changes --

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

-- Patch Links --

https://github.com/whatwg/fetch/pull/192.patch
https://github.com/whatwg/fetch/pull/192.diff

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/fetch/pull/192