[ttml2] Pull Request: Clarify ruby position application (#1091).

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

== Clarify ruby position application (#1091). ==
Closes #1091.

See https://github.com/w3c/ttml2/pull/1093

Received on Saturday, 25 May 2019 17:30:37 UTC