What's the idiomatic way to concat a bunch of slices?

append.go

// Assume the following variables...
//    r    [][]string
//    s    string
//    p    []string
//
// Problem: append to r the []string x where x is p[1:] + [s] + p[:1]
 
// 1. Do crazy appends
r = append(r, append(append(append(make([]string, 0), p[:i]...), s), p[i:]...))
 
// 2. ?

One step closer, still looks a bit unreadable...

a = append(a[:i], append([]T{x}, a[i:]...)...)