update tutorial.

R=rsc
CC=golang-dev
https://golang.org/cl/179063
diff --git a/doc/progs/print.go b/doc/progs/print.go
index cc146fe..69c35a5 100644
--- a/doc/progs/print.go
+++ b/doc/progs/print.go
@@ -7,14 +7,17 @@
 import "fmt"
 
 func main() {
-	var u64 uint64 = 1<<64-1;
-	fmt.Printf("%d %d\n", u64, int64(u64));
+	var u64 uint64 = 1<<64-1
+	fmt.Printf("%d %d\n", u64, int64(u64))
 
 	// harder stuff
-	type T struct { a int; b string };
-	t := T{77, "Sunset Strip"};
-	a := []int{1, 2, 3, 4};
-	fmt.Printf("%v %v %v\n", u64, t, a);
-	fmt.Print(u64, " ", t, " ", a, "\n");
-	fmt.Println(u64, t, a);
+	type T struct {
+		a int
+		b string
+	}
+	t := T{77, "Sunset Strip"}
+	a := []int{1, 2, 3, 4}
+	fmt.Printf("%v %v %v\n", u64, t, a)
+	fmt.Print(u64, " ", t, " ", a, "\n")
+	fmt.Println(u64, t, a)
 }