Fix indentation in code snippet

aspnetcore/mvc/views/working-with-forms.md

@@ -41,9 +41,9 @@ The Form Tag Helper above generates the following HTML:
 
 ```HTML
 <form method="post" action="/Demo/Register">
-     <!-- Input and Submit elements -->
-     <input name="__RequestVerificationToken" type="hidden" value="<removed for brevity>" />
-    </form>
+    <!-- Input and Submit elements -->
+    <input name="__RequestVerificationToken" type="hidden" value="<removed for brevity>" />
+</form>
 ```
 
 The MVC runtime generates the `action` attribute value from the Form Tag Helper attributes `asp-controller` and `asp-action`. The Form Tag Helper also generates a hidden [Request Verification Token](https://docs.microsoft.com/aspnet/mvc/overview/security/xsrfcsrf-prevention-in-aspnet-mvc-and-web-pages) to prevent cross-site request forgery (when used with the `[ValidateAntiForgeryToken]` attribute in the HTTP Post action method). Protecting a pure HTML Form from cross-site request forgery is difficult, the Form Tag Helper provides this service for you.