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diff --git a/vendor/drupal/console-core/src/Command/HelpCommand.php b/vendor/drupal/console-core/src/Command/HelpCommand.php
new file mode 100644
index 000000000..a13fef660
--- /dev/null
+++ b/vendor/drupal/console-core/src/Command/HelpCommand.php
@@ -0,0 +1,101 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Console\Core\Command\HelpCommand.
+ */
+
+namespace Drupal\Console\Core\Command;
+
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputDefinition;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Command\Command;
+use Drupal\Console\Core\Command\Shared\CommandTrait;
+use Drupal\Console\Core\Style\DrupalStyle;
+use Drupal\Console\Core\Helper\DescriptorHelper;
+
+/**
+ * HelpCommand displays the help for a given command.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class HelpCommand extends Command
+{
+    use CommandTrait;
+
+    private $command;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this->ignoreValidationErrors();
+
+        $this
+            ->setName('help')
+            ->setDefinition($this->createDefinition())
+            ->setDescription($this->trans('commands.help.description'))
+            ->setHelp($this->trans('commands.help.help'));
+    }
+
+    /**
+     * Sets the command.
+     *
+     * @param $command
+     *  The command to set
+     */
+    public function setCommand($command)
+    {
+        $this->command = $command;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $io = new DrupalStyle($input, $output);
+
+        if (null === $this->command) {
+            $this->command = $this->getApplication()->find($input->getArgument('command_name'));
+        }
+
+        if ($input->getOption('xml')) {
+            $io->info($this->trans('commands.help.messages.deprecated'), E_USER_DEPRECATED);
+            $input->setOption('format', 'xml');
+        }
+
+        $helper = new DescriptorHelper();
+        $helper->describe(
+            $io,
+            $this->command,
+            [
+                'format' => $input->getOption('format'),
+                'raw_text' => $input->getOption('raw'),
+                'command_name' => $input->getArgument('command_name'),
+                'translator' => $this->getApplication()->getTranslator()
+            ]
+        );
+
+        $this->command = null;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    private function createDefinition()
+    {
+        return new InputDefinition(
+            array(
+            new InputArgument('command_name', InputArgument::OPTIONAL, $this->trans('commands.help.arguments.command_name'), 'help'),
+            new InputOption('xml', null, InputOption::VALUE_NONE, $this->trans('commands.help.options.xml')),
+            new InputOption('raw', null, InputOption::VALUE_NONE, $this->trans('commands.help.options.raw')),
+            new InputOption('format', null, InputOption::VALUE_REQUIRED, $this->trans('commands.help.options.format'), 'txt'),
+            )
+        );
+    }
+}