Fixed issues

Author: javiereguiluz

templates.rst

@@ -418,7 +418,7 @@ Rendering a Template in Services
 Inject the ``twig`` Symfony service into your own services and use its
 ``render()`` method. When using :doc:`service autowiring </service_container/autowiring>`
 you only need to add an argument in the service constructor and type-hint it with
-the :class:`Twig\Environment` class::
+the :class:`Twig\\Environment` class::
 
     // src/Service/SomeService.php
     use Twig\Environment;
@@ -643,7 +643,7 @@ following code to display the user information is repeated in several places:
 
     {# ... #}
     <div class="user-profile">
-        <img src="{{ user.profileImageUrl }}" />
+        <img src="{{ user.profileImageUrl }}"/>
         <p>{{ user.fullName }} - {{ user.email }}</p>
     </div>
 
@@ -654,7 +654,7 @@ between full templates and template fragments).
 Then, remove that content from the original ``blog/index.html.twig`` template
 and add the following to include the template fragment:
 
-.. code-block:: html+twig
+.. code-block:: twig
 
     {# templates/blog/index.html.twig #}
 
@@ -670,7 +670,7 @@ to rename variables. Imagine that your template stores the user information in a
 variable called ``blog_post.author`` instead of the ``user`` variable that the
 template fragment expects. Use the following to *rename* the variable:
 
-.. code-block:: html+twig
+.. code-block:: twig
 
     {# templates/blog/index.html.twig #}
 
@@ -915,11 +915,11 @@ which have special meaning (e.g. replace ``<`` by the ``&lt;`` HTML entity).
 Symfony applications are safe by default because they perform automatic output
 escaping thanks to the :ref:`Twig autoescape option <config-twig-autoescape>`:
 
-.. code-block:: twig
+.. code-block:: html+twig
 
-    Hello {{ name }}
+    <p>Hello {{ name }}</p>
     {# if 'name' is '<script>alert('hello!')</script>', Twig will output this:
-       'Hello &lt;script&gt;alert(&#39;hello!&#39;)&lt;/script&gt;' #}
+       '<p>Hello &lt;script&gt;alert(&#39;hello!&#39;)&lt;/script&gt;</p>' #}
 
 If you are rendering a variable that is trusted and contains HTML contents,
 use the `Twig raw filter`_ to disable the output escaping for that variable: