unless the file was used as a test for CESU-8
The whole point of the CESU-8-like section is that it is not legal UTF-8.
Except that the document does not even cite "CESU-8" but only "UTF-16"! The text itself is puzzling as well as nearly all its suggestions about conformance levels or the way the text should be rendered, or the way a parser should recover after encoding violations...
