bug #4613 Change refering block name from content to body (martin-cerny)

This PR was merged into the 2.3 branch.

Discussion
----------

Change refering block name from content to body

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
-------

5c0ceff Change refering block name from content to body

Author: weaverryan

quick_tour/the_view.rst

@@ -126,7 +126,7 @@ Open the ``app/Resources/views/base.html.twig`` file that corresponds to the
 
 The ``{% block %}`` tags tell the template engine that a child template may
 override those portions of the template. In this example, the ``index.html.twig``
-template overrides the ``content`` block, but not the ``title`` block, which will
+template overrides the ``body`` block, but not the ``title`` block, which will
 display the default content defined in the ``base.html.twig`` template.
 
 Using Tags, Filters, and Functions