Simple inversion in Chapter 04 > 2 Crawling through sites with search

[ClemenceK]

in Chapter 04 > 2 Crawling through sites with search:
in function def search(self, topic, site):
there is: content = Content(topic, title, body, url)
instead of: content = Content(topic, url, title, body)
as in:
class Content: def __init__(self, topic, url, title, body)
making returned content difficult to understand.