Fixes and improvements

Author: javiereguiluz

components/console/helpers/tree.rst

@@ -96,11 +96,12 @@ The above code will output the following tree:
     └── templates
         └── base.html.twig
 
-Building and Rendering a Tree
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Building a Tree Programmatically
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-You can build a tree by creating a new instance of the
-:class:`Symfony\\Component\\Console\\Helper\\Tree` class and adding nodes to it::
+If you don't know the tree elements beforehand, you can build the tree programmatically
+by creating a new instance of the :class:`Symfony\\Component\\Console\\Helper\\Tree`
+class and adding nodes to it::
 
     use Symfony\Component\Console\Helper\TreeHelper;
     use Symfony\Component\Console\Helper\TreeNode;
@@ -129,20 +130,28 @@ This example outputs:
     └── tests/
         └── Functional/
 
+If you prefer, you can build the array of elements programmatically and then
+create and render the tree like this::
+
+    $tree = TreeHelper::createTree($io, null, $array);
+    $tree->render();
+
+You can also build part of the tree from an array and then add other nodes::
+
+    $node = TreeNode::fromValues($array)
+    $node->addChild('templates');
+    // ...
+    $tree = TreeHelper::createTree($io, $node);
+    $tree->render();
+
 Customizing the Tree Style
 --------------------------
 
 Built-in Tree Styles
 ~~~~~~~~~~~~~~~~~~~~
 
 The tree helper provides a few built-in styles that you can use to customize the
-output of the tree::
-
-    use Symfony\Component\Console\Helper\TreeStyle;
-    // ...
-
-    $tree = TreeHelper::createTree($io, $node, [], TreeStyle::compact());
-    $tree->render();
+output of the tree.
 
 **Default**::
 
@@ -165,7 +174,7 @@ This outputs:
     └── templates
        └── base.html.twig
 
-**Box**:
+**Box**::
 
     TreeHelper::createTree($io, $node, [], TreeStyle::box());
 
@@ -270,7 +279,7 @@ This outputs:
     . templates
       . base.html.twig
 
-**Rounded**:
+**Rounded**::
 
     TreeHelper::createTree($io, $node, [], TreeStyle::rounded());