<p dir="auto">Is <a href="https://github.com/golang/go/blob/master/doc/go_spec.html#L2398">this</a> an inside joke? It made me twitch when I read it.</p>
<pre class="notranslate">The language specification has a code example which says 9 is prime:

    // list of prime numbers
    primes := []int{2, 3, 5, 7, 9, 11, 13, 17, 19, 991}

I'd just fix it, but I have to request approval from work first.</pre>