minor #11358 fix indention for twig example (OskarStark)

This PR was merged into the 3.4 branch.

Discussion
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fix indention for twig example

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Commits
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24c3b04 fix indention for twig example

Author: javiereguiluz

translation.rst

@@ -288,16 +288,16 @@ texts* and complex expressions:
 
     .. code-block:: twig
 
-            {# text translated between tags is never escaped #}
-            {% trans %}
-                <h3>foo</h3>
-            {% endtrans %}
+        {# text translated between tags is never escaped #}
+        {% trans %}
+            <h3>foo</h3>
+        {% endtrans %}
 
-            {% set message = '<h3>foo</h3>' %}
+        {% set message = '<h3>foo</h3>' %}
 
-            {# strings and variables translated via a filter are escaped by default #}
-            {{ message|trans|raw }}
-            {{ '<h3>bar</h3>'|trans|raw }}
+        {# strings and variables translated via a filter are escaped by default #}
+        {{ message|trans|raw }}
+        {{ '<h3>bar</h3>'|trans|raw }}
 
 .. tip::