update book code

eBook/exercises/chapter_5/for_loop.go

@@ -1,16 +1,16 @@
-package main
-
-import "fmt"
-
-func main() {
-	// 1:
-	for i:=0; i < 15; i++ {
-		fmt.Printf("The counter is at %d\n", i)
-	}
-	// 2:
-	i := 0
-START:
-	fmt.Printf("The counter is at %d\n", i)
-	i++
-	if i < 15 { goto START }
+package main
+
+import "fmt"
+
+func main() {
+	// 1:
+	for i:=0; i < 15; i++ {
+		fmt.Printf("The counter is at %d\n", i)
+	}
+	// 2:
+	i := 0
+START:
+	fmt.Printf("The counter is at %d\n", i)
+	i++
+	if i < 15 { goto START }
 }