fix: coding style and file format for chapter 6.

eBook/exercises/chapter_6/lambda_value.go

@@ -1,18 +1,19 @@
-// lambda_value.go
-package main
-
-import (
-	"fmt"
-)
-
-func main() {
-	fv := func() {
-		fmt.Println("Hello World!")
-	}
-	fv()
-	fmt.Printf("The type of fv is %T", fv)
-}
-/* Output:
-Hello World!
-The type of fv is func()
-*/
+// lambda_value.go
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	fv := func() {
+		fmt.Println("Hello World!")
+	}
+	fv()
+	fmt.Printf("The type of fv is %T", fv)
+}
+
+/* Output:
+Hello World!
+The type of fv is func()
+*/