[#5095] Fixing a typo and updating to a more realistic example

Author: weaverryan

cookbook/bundles/best_practices.rst

@@ -306,7 +306,7 @@ following standardized instructions in your ``README.md`` file.
 The example above assumes that you are installing the latest stable version of
 the bundle, where you don't have to provide the package version number
 (e.g. ``composer require friendsofsymfony/user-bundle``). If the installation
-instructions refer to some past bundle version or to some inestable version,
+instructions refer to some past bundle version or to some unstable version,
 include the version constraint (e.g. ``composer require friendsofsymfony/user-bundle "~2.0@dev"``).
 
 Optionally, you can add more installation steps (*Step 3*, *Step 4*, etc.) to

cookbook/bundles/installation.rst

@@ -71,11 +71,11 @@ The only thing you need to do now is register the bundle in ``AppKernel``::
         }
     }
 
-By default, Symfony bundles are registered in all the application
-:doc:`execution environments </cookbook/configuration/environments>`. If the bundle
-is meant to be used only in some environment, register it within an ``if`` statement,
-like the following example, where the FOSUserBundle is only enabled for the
-``dev`` and ``test`` environments::
+In a few rare cases, you may want a bundle to be *only* enabled in the development
+:doc:`environment </cookbook/configuration/environments>`. For example,
+the DoctrineFixturesBundle helps load dummy data - something you probably
+only want to do while developing. To only load this bundle in the ``dev``
+and ``test`` environments, register the bundle in this way::
 
     // app/AppKernel.php
 
@@ -91,7 +91,7 @@ like the following example, where the FOSUserBundle is only enabled for the
             );
 
             if (in_array($this->getEnvironment(), array('dev', 'test'))) {
-                $bundles[] = new FOS\UserBundle\FOSUserBundle();
+                $bundles[] = new Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle();
             }
 
             // ...