fix #122

eBook/10.5.md

@@ -83,7 +83,7 @@ type B struct {
 func main() {
 	b := B{A{1, 2}, 3.0, 4.0}
 	fmt.Println(b.ax, b.ay, b.bx, b.by)
-	fmt.Println((b.A))
+	fmt.Println(b.A)
 }
 ```