[ttml2] Clarify that `\\` in literals means a single backslash.

skynavga has just created a new issue for https://github.com/w3c/ttml2:

== Clarify that `\\` in literals means a single backslash. ==
In particular, need to clarify this in the context of the following which appears in 2.3 _Document Conventions_

>a literal term (specified within quotation marks), when present, must appear exactly as specified (excluding the quotation marks themselves)

Please view or discuss this issue at https://github.com/w3c/ttml2/issues/987 using your GitHub account

Received on Sunday, 9 September 2018 15:31:32 UTC