Merge pull request #33411 from bogdanvlviv/follow-up-33401-5491f811

Clarify example of the test `ActionController::HttpAuthentication::Token` [ci skip]

actionpack/lib/action_controller/metal/http_authentication.rb

@@ -390,10 +390,9 @@ def opaque(secret_key)
     # In your integration tests, you can do something like this:
     #
     #   def test_access_granted_from_xml
-    #     get(
-    #       "/notes/1.xml", nil,
-    #       'HTTP_AUTHORIZATION' => ActionController::HttpAuthentication::Token.encode_credentials(users(:dhh).token)
-    #     )
+    #     authorization = ActionController::HttpAuthentication::Token.encode_credentials(users(:dhh).token)
+    #
+    #     get "/notes/1.xml", headers: { 'HTTP_AUTHORIZATION' => authorization }
     #
     #     assert_equal 200, status
     #   end