tests: test more vweb template features

examples/vweb/index.html

@@ -2,3 +2,14 @@ Test <b>app</b>
 <br>
 <h1>@hello</h1>
 <hr>
+@if show
+	show = true
+@end
+
+@for number in numbers
+	@number <br>
+@end
+
+
+<hr>
+End.

examples/vweb/vweb_example.v

@@ -27,8 +27,10 @@ pub fn (mut app App) json_endpoint() {
 
 pub fn (mut app App) index() {
 	app.cnt++
+	show:= true
 	//app.vweb.text('Hello world from vweb')
 	hello := 'Hello world from vweb'
+	numbers := [1,2,3]
 	$vweb.html()
 }