[ttml2] Pull Request: Clarify luminance gain prose (#1117).

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

== Clarify luminance gain prose (#1117). ==
Closes #1117.

See https://github.com/w3c/ttml2/pull/1156

Received on Sunday, 8 September 2019 03:04:35 UTC