minor symfony#4115 [Documentation] [Minor] Changes foobar.net in example.com (magnetik)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes symfony#4115). Discussion ---------- [Documentation] [Minor] Changes foobar.net in example.com As recommanded by the RFC 2606, example.com(/net/org) should be used as they are reserved for this usage. Commits ------- 715c0ed Changes foobar.net in example.com

Author: weaverryan

book/service_container.rst

@@ -82,7 +82,7 @@ you need it::
  use Acme\HelloBundle\Mailer;
 
  $mailer = new Mailer('sendmail');
- $mailer->send('ryan@foobar.net', ...);
+ $mailer->send('ryan@example.com', ...);
 
 This is easy enough. The imaginary ``Mailer`` class allows you to configure
 the method used to deliver the email messages (e.g. ``sendmail``, ``smtp``, etc).