update book code

eBook/exercises/chapter_4/function_calls_function.go

@@ -1,18 +1,18 @@
-package main
-
-var a string  // global scope
-
-func main() {
-	a = "G"
-	print(a)
-	f1()
-}
-func f1() {
-	a := "O"   // new local variable a, only scoped within f1() !
-	print(a)
-	f2()
-}
-func f2() {
-	print(a)   // global variable is taken
-}
+package main
+
+var a string  // global scope
+
+func main() {
+	a = "G"
+	print(a)
+	f1()
+}
+func f1() {
+	a := "O"   // new local variable a, only scoped within f1() !
+	print(a)
+	f2()
+}
+func f2() {
+	print(a)   // global variable is taken
+}
 // GOG