Updated the installation instructions for components introduced in 2.8

Author: javiereguiluz

components/ldap.rst

@@ -13,10 +13,11 @@ The Ldap Component
 Installation
 ------------
 
-You can install the component in 2 different ways:
+.. code-block:: terminal
 
-* :doc:`Install it via Composer </components/using_components>` (``symfony/ldap`` on `Packagist`_);
-* Use the official Git repository (https://github.com/symfony/ldap).
+    $ composer require symfony/ldap
+
+Alternatively, you can clone the `<https://github.com/symfony/ldap>`_ repository.
 
 .. include:: /components/require_autoload.rst.inc
 

components/property_info.rst

@@ -22,11 +22,11 @@ within that class.
 Installation
 ------------
 
-You can install the component in two different ways:
+.. code-block:: terminal
 
-* :doc:`Install it via Composer </components/using_components>` (``symfony/property-info``
-  on `Packagist`_);
-* Use the official Git repository (https://github.com/symfony/property-info).
+    $ composer require symfony/property-info
+
+Alternatively, you can clone the `<https://github.com/symfony/property-info>`_ repository.
 
 .. include:: /components/require_autoload.rst.inc