[#1975] Reverting one change - this isn't much longer at all, and since this code is copied-and-pasted, this is much cleaner I think

Author: weaverryan

book/security.rst

@@ -424,9 +424,7 @@ Next, create the controller that will display the login form::
             $session = $request->getSession();
 
             // get the login error if there is one
-            if (
-                $request->attributes->has(SecurityContext::AUTHENTICATION_ERROR)
-            ) {
+            if ($request->attributes->has(SecurityContext::AUTHENTICATION_ERROR)) {
                 $error = $request->attributes->get(
                     SecurityContext::AUTHENTICATION_ERROR
                 );