Syntax error in golang template:
func TraverseTCPStates(events: []string) string
instead of
func TraverseTCPStates(events []string) string

If num == 0 random test expect get 1 copy of word, as if num was 1. Kate description say nothing about it

Someone forget remove unused import, other copy-paste

Phhh what a bullshit i just wrote (:

W/o some non-trivial external information we can't get subjective correct answer for en.wikipedia.org (wikipedia) and google.co.uk (google). There is lists of TLD-like domain zones (co.jp, gov.il and so), Let's Encrypt use such list for some request limitation, but such lists can't be complete and accurate.
Thats why this kata accept en as correct ansfer for en.wikipedia.org

In my benchmark function with Counter was much slower (like 10 time slower) then function with str.count. str.count run N times only if first non-repeating char is last char of string. And str.count itself has O(N) only in worst case

It feels soooooo wrong, but it's so easy, it's readable and fast enough

Why is it 5 kyu? It's simple task. Erlier this day i spend much more time on few 6 kyu katas