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

examples/eventbus/eventbus.v

@@ -2,9 +2,9 @@ module main
 
 import some_module
 
-fn main(){
+fn main() {
 	mut sub := some_module.get_subscriber()
-	sub.subscribe("error", on_error)
+	sub.subscribe('error', on_error)
 	some_module.do_work()
 }
 

examples/eventbus/modules/some_module/some_module.v

@@ -16,19 +16,19 @@ pub:
 	message string
 }
 
-pub fn do_work(){
+pub fn do_work() {
 	work := Work{20}
-	for i in 0..20 {
-		println("working...")
+	for i in 0 .. 20 {
+		println('working...')
 		if i == 15 {
-			error := &MyError{"There was an error."}
-			eb.publish("error", work, error)
-			eb.publish("error", work, error)
+			error := &MyError{'There was an error.'}
+			some_module.eb.publish('error', work, error)
+			some_module.eb.publish('error', work, error)
 			return
 		}
 	}
 }
 
 pub fn get_subscriber() eventbus.Subscriber {
-	return *eb.subscriber
+	return *some_module.eb.subscriber
 }