Merge branch '6.4' into 7.1

* 6.4:
  Update testing.rst
  [DomCrawler] Fixing code typo

Author: javiereguiluz

components/dom_crawler.rst

@@ -267,7 +267,7 @@ The result is an array of values returned by the anonymous function calls.
 When using nested crawler, beware that ``filterXPath()`` is evaluated in the
 context of the crawler::
 
-    $crawler->filterXPath('parent')->each(function (Crawler $parentCrawler, $i): avoid {
+    $crawler->filterXPath('parent')->each(function (Crawler $parentCrawler, $i): void {
         // DON'T DO THIS: direct child can not be found
         $subCrawler = $parentCrawler->filterXPath('sub-tag/sub-child-tag');
 

testing.rst

@@ -712,6 +712,10 @@ stores in the session of the test client. If you need to define custom
 attributes in this token, you can use the ``tokenAttributes`` argument of the
 :method:`Symfony\\Bundle\\FrameworkBundle\\KernelBrowser::loginUser` method.
 
+To set a specific firewall (``main`` is set by default)::
+
+    $client->loginUser($testUser, 'my_firewall');
+
 .. note::
 
     By design, the ``loginUser()`` method doesn't work when using stateless firewalls.