fix: coding style and file format for all example.

eBook/examples/chapter_12/read_file2.go

@@ -1,38 +1,39 @@
-// read_csvfile.go
-package main
-
-import (
-	"fmt"
-	"os"
-//	"io/ioutil"
-//	"strings"
-)
-
-func main() {
-	file, err := os.Open("products2.txt")
-	if err != nil {
-		panic(err)
-	}
-	defer file.Close()
-
-	var col1, col2, col3 []string
-	for {
-		var v1, v2, v3 string
-		_, err := fmt.Fscanln(file, &v1, &v2, &v3)
-		if err != nil {
-			break
-		}
-		col1 = append(col1, v1)
-		col2 = append(col2, v2)
-		col3 = append(col3, v3)
-	}
-
-	fmt.Println(col1)
-	fmt.Println(col2)
-	fmt.Println(col3)
-}
-/* Output:
-[ABC FUNC GO]
-[40 56 45]
-[150 280 356]
-*/
+// read_csvfile.go
+package main
+
+import (
+	"fmt"
+	"os"
+	//	"io/ioutil"
+	//	"strings"
+)
+
+func main() {
+	file, err := os.Open("products2.txt")
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+
+	var col1, col2, col3 []string
+	for {
+		var v1, v2, v3 string
+		_, err := fmt.Fscanln(file, &v1, &v2, &v3)
+		if err != nil {
+			break
+		}
+		col1 = append(col1, v1)
+		col2 = append(col2, v2)
+		col3 = append(col3, v3)
+	}
+
+	fmt.Println(col1)
+	fmt.Println(col2)
+	fmt.Println(col3)
+}
+
+/* Output:
+[ABC FUNC GO]
+[40 56 45]
+[150 280 356]
+*/