minor #28301 Fix code examples in PHPDoc (maidmaid)

This PR was merged into the 2.8 branch.

Discussion
----------

Fix code examples in PHPDoc

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | /
| License       | MIT
| Doc PR        | /

This PR properly indents the code examples in PHPDoc for a clean render.

Commits
-------

1afb043dc5 Fix code examples in PHPDoc

Author: fabpot

Container.php

@@ -33,11 +33,9 @@
  * A service can also be defined by creating a method named
  * getXXXService(), where XXX is the camelized version of the id:
  *
- * <ul>
- *   <li>request -> getRequestService()</li>
- *   <li>mysql_session_storage -> getMysqlSessionStorageService()</li>
- *   <li>symfony.mysql_session_storage -> getSymfony_MysqlSessionStorageService()</li>
- * </ul>
+ *  * request -> getRequestService()
+ *  * mysql_session_storage -> getMysqlSessionStorageService()
+ *  * symfony.mysql_session_storage -> getSymfony_MysqlSessionStorageService()
  *
  * The container can have three possible behaviors when a service does not exist:
  *

ContainerBuilder.php

@@ -493,10 +493,10 @@ public function get($id, $invalidBehavior = ContainerInterface::EXCEPTION_ON_INV
      * the parameters passed to the container constructor to have precedence
      * over the loaded ones.
      *
-     * $container = new ContainerBuilder(new ParameterBag(array('foo' => 'bar')));
-     * $loader = new LoaderXXX($container);
-     * $loader->load('resource_name');
-     * $container->register('foo', 'stdClass');
+     *     $container = new ContainerBuilder(new ParameterBag(array('foo' => 'bar')));
+     *     $loader = new LoaderXXX($container);
+     *     $loader->load('resource_name');
+     *     $container->register('foo', 'stdClass');
      *
      * In the above example, even if the loaded resource defines a foo
      * parameter, the value will still be 'bar' as defined in the ContainerBuilder
@@ -999,14 +999,14 @@ private function doResolveServices($value, \SplObjectStorage $inlinedDefinitions
      *
      * Example:
      *
-     * $container->register('foo')->addTag('my.tag', array('hello' => 'world'));
+     *     $container->register('foo')->addTag('my.tag', array('hello' => 'world'));
      *
-     * $serviceIds = $container->findTaggedServiceIds('my.tag');
-     * foreach ($serviceIds as $serviceId => $tags) {
-     *     foreach ($tags as $tag) {
-     *         echo $tag['hello'];
+     *     $serviceIds = $container->findTaggedServiceIds('my.tag');
+     *     foreach ($serviceIds as $serviceId => $tags) {
+     *         foreach ($tags as $tag) {
+     *             echo $tag['hello'];
+     *         }
      *     }
-     * }
      *
      * @param string $name The tag name
      *