Add syntax highlighting on README

README.md

@@ -5,34 +5,38 @@ Console eases the creation of beautiful and testable command line interfaces.
 
 The Application object manages the CLI application:
 
-    use Symfony\Component\Console\Application;
+``` php
+use Symfony\Component\Console\Application;
 
-    $console = new Application();
-    $console->run();
+$console = new Application();
+$console->run();
+```
 
 The ``run()`` method parses the arguments and options passed on the command
 line and executes the right command.
 
 Registering a new command can easily be done via the ``register()`` method,
 which returns a ``Command`` instance:
 
-    use Symfony\Component\Console\Input\InputInterface;
-    use Symfony\Component\Console\Input\InputArgument;
-    use Symfony\Component\Console\Input\InputOption;
-    use Symfony\Component\Console\Output\OutputInterface;
-
-    $console
-        ->register('ls')
-        ->setDefinition(array(
-            new InputArgument('dir', InputArgument::REQUIRED, 'Directory name'),
-        ))
-        ->setDescription('Displays the files in the given directory')
-        ->setCode(function (InputInterface $input, OutputInterface $output) {
-            $dir = $input->getArgument('dir');
-
-            $output->writeln(sprintf('Dir listing for <info>%s</info>', $dir));
-        })
-    ;
+``` php
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+$console
+    ->register('ls')
+    ->setDefinition(array(
+        new InputArgument('dir', InputArgument::REQUIRED, 'Directory name'),
+    ))
+    ->setDescription('Displays the files in the given directory')
+    ->setCode(function (InputInterface $input, OutputInterface $output) {
+        $dir = $input->getArgument('dir');
+
+        $output->writeln(sprintf('Dir listing for <info>%s</info>', $dir));
+    })
+;
+```
 
 You can also register new commands via classes.
 
@@ -45,9 +49,11 @@ Tests
 
 You can run the unit tests with the following command:
 
-    $ cd path/to/Symfony/Component/Console/
-    $ composer.phar install
-    $ phpunit
+``` sh
+$ cd path/to/Symfony/Component/Console/
+$ composer.phar install
+$ phpunit
+```
 
 Third Party
 -----------