An error was showing up while deleting questions
(in the question_save_from_deletion method) which had been saved
and which belonged to a quiz with a super long name, not exceeding 255
characters, as the 'name' field in 'question_categories' table had a
max size of 255 characters. The shorten_text function was used to
shorten the string to 255 characters and a unit test was added with
the name test_question_save_from_deletion_quiz_with_long_name to test
the patch.
86127e774f