[ttml2] Pull Request: Clarify application of ruby alignment and positioning (#717).

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

== Clarify application of ruby alignment and positioning (#717). ==
Closes #717.

See https://github.com/w3c/ttml2/pull/740

Received on Saturday, 12 May 2018 22:23:06 UTC