Merge branch '4.3' into 4.4

* 4.3:
  Remove space before self closing xml tag
  Added the missing "experimental" notices in some components
  use Cookie::create()

Author: javiereguiluz

components/http_client.rst

@@ -11,7 +11,8 @@ The HttpClient Component
 
 .. versionadded:: 4.3
 
-    The HttpClient component was introduced in Symfony 4.3.
+    The HttpClient component was introduced in Symfony 4.3 and it's still
+    considered an :doc:`experimental feature </contributing/code/experimental>`.
 
 Installation
 ------------

components/http_foundation.rst

@@ -413,7 +413,7 @@ attribute::
 
     use Symfony\Component\HttpFoundation\Cookie;
 
-    $response->headers->setCookie(new Cookie('foo', 'bar'));
+    $response->headers->setCookie(Cookie::create('foo', 'bar'));
 
 The
 :method:`Symfony\\Component\\HttpFoundation\\ResponseHeaderBag::setCookie`

components/mailer.rst

@@ -7,6 +7,11 @@ The Mailer Component
 
     The Mailer component helps sending emails.
 
+.. versionadded:: 4.3
+
+    The Mailer component was introduced in Symfony 4.3 and it's still
+    considered an :doc:`experimental feature </contributing/code/experimental>`.
+
 Installation
 ------------
 

components/mime.rst

@@ -6,9 +6,14 @@
 The Mime Component
 ==================
 
-    The MIME component allows manipulating the MIME messages used to send emails
+    The Mime component allows manipulating the MIME messages used to send emails
     and provides utilities related to MIME types.
 
+.. versionadded:: 4.3
+
+    The Mime component was introduced in Symfony 4.3 and it's still
+    considered an :doc:`experimental feature </contributing/code/experimental>`.
+
 Installation
 ------------
 

components/phpunit_bridge.rst

@@ -649,7 +649,7 @@ If you have installed the bridge through Composer, you can run it by calling e.g
 
     It's possible to change the base version of PHPUnit by setting the
     ``SYMFONY_PHPUNIT_VERSION`` env var in the ``phpunit.xml.dist`` file (e.g.
-    ``<server name="SYMFONY_PHPUNIT_VERSION" value="5.5" />``). This is the
+    ``<server name="SYMFONY_PHPUNIT_VERSION" value="5.5"/>``). This is the
     preferred method as it can be committed to your version control repository.
 
     It's also possible to set ``SYMFONY_PHPUNIT_VERSION`` as a real env var