[webvtt] Pull Request: Fix #217: Clarify that only validators will validate language tags

zcorpan has just submitted a new pull request for 
https://github.com/w3c/webvtt:

== Fix #217: Clarify that only validators will validate language tags 
==
See #217

See https://github.com/w3c/webvtt/pull/256

Received on Friday, 13 November 2015 10:04:44 UTC