gannt chart text output doesn't wrap to frame

[pleabargain]

Here's the code:
[Prototype design] lasts 15 days
[Test prototype] lasts 10 days
-- A poor as it lacks the ability to set a different --
-- start day example --
[Task 1 (3 day)] lasts 3 days
[T2 (5 days)] lasts 5 days
[T3 (1 week)] lasts 1 week
[T4 (1 week and 4 days)] lasts 1 week and 4 days
[T5 (2 weeks)] lasts 2 weeks

Here's the colab doc
https://github.com/pleabargain/ipynb/blob/master/basic_GANNT_chart_with_plantuml.ipynb

thank you!