Minor reword

Author: javiereguiluz

components/http_kernel.rst

@@ -709,12 +709,15 @@ look like this::
         // ...
     }
 
-.. _http-kernel-resource-locator:
+.. note::
 
-Also, note that by default, if the ``_format`` attribute is not set in your request, the value will be ``html``.
-So, if your sub request returns something else than ``html`` (like json for instance) you can set it by setting the ``_format`` attribute on the request::
+    The default value of the ``_format`` request attribute is ``html``. If your
+    sub request returns a different format (e.g. ``json``) you can set it by
+    defining the ``_format`` attribute explicitly on the request::
 
-    $request->attributes->set('_format', 'json');
+        $request->attributes->set('_format', 'json');
+
+.. _http-kernel-resource-locator:
 
 Locating Resources
 ------------------