normal string format and locale support string format

src/core/api.coffee

@@ -62,7 +62,8 @@ String.prototype.asUint8Array = () ->
 if not String.prototype.format
     String.prototype.format = () ->
         args = arguments
-        return new FormatedString(@, args)
+        return @replace /{(\d+)}/g, (match, number) ->
+            return if typeof args[number] != 'undefined' then args[number] else match
 
 String.prototype.f = () ->
     args = arguments

src/core/tags/afx-html.tag

@@ -14,7 +14,7 @@
         }
         this.on("update", function(){
             if(self.updateContent)
-                self.updateContent()
+                self.root.innerHTML = self.updateContent()
         })
     </script>
 </afx-html>