Merge branch '5.4' into 6.3

* 5.4:
  [Console] Mention `Terminal`

Author: javiereguiluz

console.rst

@@ -574,6 +574,21 @@ call ``setAutoExit(false)`` on it to get the command result in ``CommandTester``
     :class:`Symfony\\Component\\Console\\Application`
     and extend the normal ``\PHPUnit\Framework\TestCase``.
 
+When testing your commands, it could be useful to understand how your command
+reacts on different settings like the width and the height of the terminal.
+You have access to such information thanks to the
+:class:`Symfony\\Component\\Console\\Terminal` class:
+
+    use Symfony\Component\Console\Terminal;
+
+    $terminal = new Terminal();
+
+    // gets the number of lines available
+    $height = $terminal->getHeight();
+
+    // gets the number of columns available
+    $width = $terminal->getWidth();
+
 Logging Command Errors
 ----------------------