tools: format most examples and tutorials, add them to v test-cleancode (#9826)

examples/fibonacci.v

@@ -3,15 +3,15 @@
 
 fn main() {
 	// Check for user input
-//if os.args.len != 2 {
-//		println('usage: fibonacci [rank]')
+	// if os.args.len != 2 {
+	//		println('usage: fibonacci [rank]')
 
-		// Exit
-//		return
-//	}
+	// Exit
+	//		return
+	//	}
 
 	// Parse first argument and cast it to int
-//	stop := os.args[1].int()
+	//	stop := os.args[1].int()
 	stop := 23
 	// Can only calculate correctly until rank 92
 	if stop > 92 {
@@ -23,7 +23,7 @@ fn main() {
 	mut a := 0
 	mut b := 0
 	mut c := 1
-	println(a+c+c)
+	println(a + c + c)
 	for _ in 0 .. stop {
 		// Set a and b to the next term
 		a = b