[imsc] Pull Request: Remove recommendation against TAB characters per TTML2 semantics

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

== Remove recommendation against TAB characters per TTML2 semantics ==
Closes #353

See https://github.com/w3c/imsc/pull/355

Received on Friday, 9 March 2018 23:21:32 UTC