fix: coding style and file format for all example.

eBook/examples/chapter_10/pointer_value.go

@@ -1,28 +1,29 @@
-// pointer_value.go
-package main
-
-import (
-	"fmt"
-)
-
-type B struct {
-	thing  int
-}
-
-func (b *B) change() {  b.thing = 1 }
-
-func (b B) write() string { return fmt.Sprint(b) }
-
-func main() {
-	  var b1 B  // b1 is value
-      b1.change()
-      fmt.Println(b1.write())
-
-      b2 := new(B)  // b2 is pointer
-      b2.change()
-      fmt.Println(b2.write())
-}
-/* Output:
-{1}
-{1}
-*/
+// pointer_value.go
+package main
+
+import (
+	"fmt"
+)
+
+type B struct {
+	thing int
+}
+
+func (b *B) change() { b.thing = 1 }
+
+func (b B) write() string { return fmt.Sprint(b) }
+
+func main() {
+	var b1 B // b1 is value
+	b1.change()
+	fmt.Println(b1.write())
+
+	b2 := new(B) // b2 is pointer
+	b2.change()
+	fmt.Println(b2.write())
+}
+
+/* Output:
+{1}
+{1}
+*/