There is a mistake which needs to be corrected. There should be space between double inverted commas as per the output shown and explained. It should be as end=" " not end="".
Also there are some erros in quiz questions, like some quiz questions appear in the section where topic not explained yet, some quiz questions answers in provided IDE throws output answer which is not same as quiz answers which confuses students which is correct answer either the IDE or quiz answers.
Attached is the screenshot.