Update HISTORY.md

HISTORY.md

@@ -7,7 +7,7 @@ Features
 * Clearer and more specific error messages regarding invalid mojits and exceptions.
 * Routes.json now accepts an annotations object (see [express annotations](https://github.com/yahoo/express-annotations#express-annotations)). Also the "client" annotation can be used to specify whether to expose the route to the client; by default, routes are exposed to the client.
 
-Ex routes.json:
+Ex. routes.json:
 
 ```js
 ...