Fixing typos in IMSC 1.1

Good morning/evening,

Below are two PRs intended to fix typos uncovered in IMSC 1.1:

https://github.com/w3c/imsc/pull/479
https://github.com/w3c/imsc/pull/478

The plan is to apply them to both (a) IMSC 1.1 REC in place and (b)
the next revision of IMSC.

Please review carefully.

Best,

-- Pierre

Received on Saturday, 22 June 2019 23:43:52 UTC