[webcomponents] typo: 'piecing' -> 'piercing' (#281)

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

  https://github.com/w3c/webcomponents/pull/281

-- Commit Summary --

  * typo: 'piecing' -> 'piercing'

-- File Changes --

    M spec/shadow/index.html (2)

-- Patch Links --

https://github.com/w3c/webcomponents/pull/281.patch
https://github.com/w3c/webcomponents/pull/281.diff

---
Reply to this email directly or view it on GitHub:
https://github.com/w3c/webcomponents/pull/281