minor #11181 use :: instead of .. code-block:: php (OskarStark)

This PR was merged into the 3.4 branch.

Discussion
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use :: instead of .. code-block:: php

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Commits
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a96cb3a use :: instead of .. code-block:: php

Author: javiereguiluz

components/expression_language/extending.rst

@@ -27,9 +27,7 @@ This method has 3 arguments:
 * **name** - The name of the function in an expression;
 * **compiler** - A function executed when compiling an expression using the
   function;
-* **evaluator** - A function executed when the expression is evaluated.
-
-.. code-block:: php
+* **evaluator** - A function executed when the expression is evaluated::
 
     use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 

components/security/authorization.rst

@@ -49,7 +49,7 @@ recognizes several strategies:
 ``unanimous``
     only grant access if none of the voters has denied access;
 
-.. code-block:: php
+Usage of the available options in detail::
 
     use Symfony\Component\Security\Core\Authorization\AccessDecisionManager;
 

deployment/proxies.rst

@@ -59,9 +59,7 @@ In this case, you'll need to - *very carefully* - trust *all* proxies.
    other than your load balancers. For AWS, this can be done with `security groups`_.
 
 #. Once you've guaranteed that traffic will only come from your trusted reverse
-   proxies, configure Symfony to *always* trust incoming request:
-
-   .. code-block:: php
+   proxies, configure Symfony to *always* trust incoming request::
 
        // web/app.php
 

workflow/usage.rst

@@ -142,7 +142,7 @@ like this:
             ],
         ]);
 
-.. code-block:: php
+As configured, the following property is used by the marking store::
 
     class BlogPost
     {