[ttml1] Pull Request: Do not prune <br> elements

palemieux has just submitted a new pull request for https://github.com/w3c/ttml1:

== Do not prune <br> elements ==
Closes #197 

See https://github.com/w3c/ttml1/pull/289

Received on Thursday, 14 December 2017 00:03:29 UTC