[ttml2] Pull Request: Clarify explanation of percentage edge offset in tts:position example…

skynavga has just submitted a new pull request for https://github.com/w3c/ttml2:

== Clarify explanation of percentage edge offset in tts:position example… ==
… (#712).

Closes #712.

See https://github.com/w3c/ttml2/pull/741

Received on Sunday, 13 May 2018 19:39:59 UTC