ArrayList addition (inc. test, example and documentation)

stacks/arraystack/arraystack_test.go

@@ -80,9 +80,6 @@ func TestArrayStack(t *testing.T) {
 }
 
 func BenchmarkArrayStack(b *testing.B) {
-	// Faster in comparison to the LinkedListStack
-	// BenchmarkArrayStack       5000    325010 ns/op    71648 B/op  1009 allocs/op
-	// BenchmarkLinkedListStack  5000    390812 ns/op    40016 B/op  2001 allocs/op
 	for i := 0; i < b.N; i++ {
 		stack := New()
 		for n := 0; n < 1000; n++ {