Textarea example form is limited to 8 character input

The textarea widget in the test example form is limited to 8 characters. This looks like a simple oversight as 'textarea' has not been added to the case statement in FormWidgetExampleForm::getExampleContextDefinition. Consequently it uses the 'default' case branch which is designed for the simple text string input.

So we get a textarea which accidentally only allows 8 characters!

This only actually a problem when using the test example forms interactively. The phpunit textarea definition does not include the 8 character maximum.