fix: coding style and file format for all example.

eBook/examples/chapter_4/char.go

@@ -1,22 +1,23 @@
-// char.go
-package main
-
-import (
-	"fmt"
-)
-
-func main() {
-	var ch int = '\u0041'
-	var ch2 int = '\u03B2' 
-	var ch3 int = '\U00101234'
-	fmt.Printf("%d - %d - %d\n", ch, ch2, ch3)
-	fmt.Printf("%c - %c - %c\n", ch, ch2, ch3)
-	fmt.Printf("%X - %X - %X\n", ch, ch2, ch3)
-	fmt.Printf("%U - %U - %U", ch, ch2, ch3)
-}
-/* Ouput: 
-65 - 946 - 1053236
-A - β - 􁈴
-41 - 3B2 - 101234
-U+0041 - U+03B2 - U+101234
-*/
+// char.go
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	var ch int = '\u0041'
+	var ch2 int = '\u03B2'
+	var ch3 int = '\U00101234'
+	fmt.Printf("%d - %d - %d\n", ch, ch2, ch3)
+	fmt.Printf("%c - %c - %c\n", ch, ch2, ch3)
+	fmt.Printf("%X - %X - %X\n", ch, ch2, ch3)
+	fmt.Printf("%U - %U - %U", ch, ch2, ch3)
+}
+
+/* Ouput:
+65 - 946 - 1053236
+A - β - 􁈴
+41 - 3B2 - 101234
+U+0041 - U+03B2 - U+101234
+*/