[ttml2] Pull Request: apply fix from ttml1/#275

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

== apply fix from ttml1/#275 ==
partially addresses #358 

See https://github.com/w3c/ttml2/pull/578

Received on Thursday, 18 January 2018 23:45:08 UTC