import re
start_url = "https://z...content-available-to-author-only...o.fr"
start_url = re.sub(r'/([^/]+)$', r'/\1/', start_url)
print(start_url)
aW1wb3J0IHJlCgpzdGFydF91cmwgPSAiaHR0cHM6Ly96Li4uY29udGVudC1hdmFpbGFibGUtdG8tYXV0aG9yLW9ubHkuLi5vLmZyIgpzdGFydF91cmwgPSByZS5zdWIocicvKFteL10rKSQnLCByJy9cMS8nLCBzdGFydF91cmwpCnByaW50KHN0YXJ0X3VybCk=