Nano - simple quotes vs double quotes

simple quotes vs double quotes

Resources/doc/reference/saving_hooks.rst

@@ -103,6 +103,6 @@ The service declaration where the ``UserManager`` is injected into the Admin cla
             <argument />
 
             <call method="setUserManager">
-                <argument type='service' id='fos_user.user_manager' />
+                <argument type="service" id="fos_user.user_manager" />
             </call>
         </service>