added some sorting to the slices example

slices/go.go

@@ -1,10 +1,13 @@
 package main
 
 import "fmt"
+import "sort"
 
 func main() {
-    p := []int{2, 3, 5, 7, 11, 13}
+	p := []int{2, 3, 13, 7, 5, 11}
 	fmt.Println("p ==", p)
+	sort.Ints(p)
+	fmt.Printf("%T p: %v\n", p, p)
 
 	for i := 0; i < len(p); i++ {
 		fmt.Printf("p[%d] == %d\n", i, p[i])
@@ -18,4 +21,5 @@ func main() {
 	v := make([]string, 0)
 	v = append(v, "hello", "world")
 	fmt.Printf("%v\n", v)
+
 }