fix: coding style and file format for all example.

eBook/examples/chapter_5/ifelse.go

@@ -1,22 +1,22 @@
-package main
-
-import "fmt"
-
-func main() {
-	var first int = 10
-	var cond int
-
-	if first <= 0 {
-		fmt.Printf("first is less than or equal to 0\n")
-	} else if first > 0 && first < 5 {
-		fmt.Printf("first is between 0 and 5\n")
-	} else {
-		fmt.Printf("first is 5 or greater\n")
-	}
-
-	if cond = 5; cond > 10 {
-		fmt.Printf("cond is greater than 10\n")
-	} else {
-		fmt.Printf("cond is not greater than 10\n")
-	}
-}
+package main
+
+import "fmt"
+
+func main() {
+	var first int = 10
+	var cond int
+
+	if first <= 0 {
+		fmt.Printf("first is less than or equal to 0\n")
+	} else if first > 0 && first < 5 {
+		fmt.Printf("first is between 0 and 5\n")
+	} else {
+		fmt.Printf("first is 5 or greater\n")
+	}
+
+	if cond = 5; cond > 10 {
+		fmt.Printf("cond is greater than 10\n")
+	} else {
+		fmt.Printf("cond is not greater than 10\n")
+	}
+}