[webcomponents] Minor editorial fixes. (#337)

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

  https://github.com/w3c/webcomponents/pull/337

-- Commit Summary --

  * Minor editorial fixes.

-- File Changes --

    M spec/shadow/index.html (4)

-- Patch Links --

https://github.com/w3c/webcomponents/pull/337.patch
https://github.com/w3c/webcomponents/pull/337.diff

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/webcomponents/pull/337