fix https://github.com/kataras/iris/issues/1141 and https://github.com/kataras/iris/issues/1142

Former-commit-id: d8d73b3e1b713af9bf7b4712121324079ede6a41

_examples/routing/route-state/main.go

@@ -31,6 +31,8 @@ func main() {
 		// same as navigating to "http://localhost:8080/invisible/iris" when /change has being invoked and route state changed
 		// from "offline" to "online"
 		ctx.Values().Set("from", "/execute") // values and session can be shared when calling Exec from a "foreign" context.
+		// 	ctx.Exec("NONE", "/invisible/iris")
+		// or after "/change":
 		ctx.Exec("GET", "/invisible/iris")
 	})