Merge branch '7.2' into 7.3

* 7.2:
  fix: minor in file `webhook.rst`
  Fix yaml and xml example syntax error at factories.rst

service_container/factories.rst

@@ -389,7 +389,7 @@ e.g. change the service based on a parameter:
 
             # you can use the arg() function to retrieve an argument from the definition
             App\Email\NewsletterManagerInterface:
-                factory: "@=arg(0).createNewsletterManager() ?: service("default_newsletter_manager")"
+                factory: '@=arg(0).createNewsletterManager() ?: service("default_newsletter_manager")'
                 arguments:
                     - '@App\Email\NewsletterManagerFactory'
 
@@ -410,7 +410,7 @@ e.g. change the service based on a parameter:
 
                 <!-- you can use the arg() function to retrieve an argument from the definition -->
                 <service id="App\Email\NewsletterManagerInterface">
-                    <factory expression="arg(0).createNewsletterManager() ?: service("default_newsletter_manager")"/>
+                    <factory expression="arg(0).createNewsletterManager() ?: service('default_newsletter_manager')"/>
                     <argument type="service" id="App\Email\NewsletterManagerFactory"/>
                 </service>
             </services>

webhook.rst

@@ -117,7 +117,7 @@ webhook consumer code.
 The webhook routing name is part of the URL you need to configure at the
 third-party mailer provider. The URL is the concatenation of your domain name
 and the routing name you chose in the configuration (like
-``https://example.com/webhook/mailer_mailgun``.
+``https://example.com/webhook/mailer_mailgun``).
 
 For Mailgun, you will get a secret for the webhook. Store this secret as
 MAILER_MAILGUN_SECRET (in the :doc:`secrets management system