Update Azure-Active-Directory-Authentication-MVC.md

empty space fix

docs/en/How-To/Azure-Active-Directory-Authentication-MVC.md

@@ -158,15 +158,15 @@ You can find the source code of the completed example [here](https://github.com/
        ````
 
 
-* Help! I am getting ***System.ArgumentNullException: Value cannot be null. (Parameter 'userName')*** error!
+* Help! I am getting ***System.ArgumentNullException: Value cannot be null. (Parameter 'userName')*** error! 
 
   
 *  This occurs when you use Azure Authority **v2.0 endpoint** without requesting `email` scope. [Abp checks unique email to create user](https://github.com/abpframework/abp/blob/037ef9abe024c03c1f89ab6c933710bcfe3f5c93/modules/account/src/Volo.Abp.Account.Web/Pages/Account/Login.cshtml.cs#L208). Simply add 
   
-      ````csharp
-      options.Scope.Add("email");
-      ````
-  
+    ````csharp
+  options.Scope.Add("email");
+    ````
+    
       to your openid configuration.
 
 * Help! I keep getting ***AADSTS50011: The reply URL specified in the request does not match the reply URLs configured for the application*** error!