frame.create, story.setText, text.insert and the other commands that take
text kept U+000B as a character, drawn as a missing-glyph box. It is the
forced line break of Word and PowerPoint text (Chr(11), Shift+Enter), and
what people porting scripts try first, so text_param now reads it as
U+2028, the forced line break, next to the CR handling it already has.
script --help and docs/agents.md say so.