Update start-mvc.md (#5170)

* Update start-mvc.md

* Minor tweaks

aspnetcore/tutorials/first-mvc-app/start-mvc.md

@@ -91,7 +91,7 @@ Tap **F5** to run the app in debug mode or **Ctrl-F5** in non-debug mode.
 <!-- These images are also used by uid: tutorials/first-mvc-app-xplat/start-mvc -->
 ![running app](start-mvc/_static/1.png)
 
-* Visual Studio starts [IIS Express](https://docs.microsoft.com/iis/extensions/introduction-to-iis-express/iis-express-overview) and runs your app. Notice that the address bar shows `localhost:port#` and not something like `example.com`. That's because `localhost` is the standard hostname for your local computer. When Visual Studio creates a web project, a random port is used for the web server. In the image above, the port number is 5000. When you run the app, you'll see a different port number.
+* Visual Studio starts [IIS Express](https://docs.microsoft.com/iis/extensions/introduction-to-iis-express/iis-express-overview) and runs your app. Notice that the address bar shows `localhost:port#` and not something like `example.com`. That's because `localhost` is the standard hostname for your local computer. When Visual Studio creates a web project, a random port is used for the web server. In the image above, the port number is 5000. The URL in the browser shows `localhost:5000`. When you run the app, you'll see a different port number.
 * Launching the app with **Ctrl+F5** (non-debug mode) allows you to make code changes, save the file, refresh the browser, and see the code changes. Many developers prefer to use non-debug mode to quickly launch the app and view changes.
 * You can launch the app in debug or non-debug mode from the **Debug** menu item: