Testing if permlinks can have special symbols like : []:():@:$:#:%:^:*:|:":':<:>:?:!
URL is: https://steemit.com/test/@investigation/testing-if-permlinks-can-have-special-symbols-like-usd-or
permlink is: testing-if-permlinks-can-have-special-symbols-like-usd-or
Conclusion:
Special symbols are not allowed.