Fix use mistakes.

Author: Marvin Butkereit

components/console/introduction.rst

@@ -140,6 +140,9 @@ output. For example::
 It is possible to define your own styles using the class
 :class:`Symfony\\Component\\Console\\Formatter\\OutputFormatterStyle`::
 
+    use Symfony\Component\Console\Formatter\OutputFormatterStyle;
+
+    // ...
     $style = new OutputFormatterStyle('red', 'yellow', array('bold', 'blink'));
     $output->getFormatter()->setStyle('fire', $style);
     $output->writeln('<fire>foo</fire>');

components/templating/helpers/assetshelper.rst

@@ -54,6 +54,8 @@ To avoid using the cached resource after updating the old resource, you can
 use versions which you bump every time you release a new project. The version
 can be specified in the third argument::
 
+    use Symfony\Component\Templating\Asset\PathPackage;
+
     // ...
     $templateEngine->set(new AssetsHelper(null, null, '328rad75'));