[webvtt] Use bikeshed markup for terms correctly (using for="" etc)

zcorpan has just created a new issue for 
https://github.com/w3c/webvtt:

== Use bikeshed markup for terms correctly (using for="" etc) ==
But make sure to not break id=""s.

Please view or discuss this issue at 
https://github.com/w3c/webvtt/issues/322 using your GitHub account

Received on Monday, 23 January 2017 21:53:30 UTC