merged branch ricardclau/typo_sort_doc (PR twigphp#1039)

This PR was merged into the master branch.

Discussion
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Minor typo in sort filter documentation

I've found this small typo while working on shuffle filter documentation in https://github.com/fabpot/Twig/pull/1038

I decided to create separate PR in case https://github.com/fabpot/Twig/pull/1038 got rejected

Best regards!

Commits
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1443b76 minor typo in sort documentation

doc/filters/sort.rst

@@ -5,7 +5,7 @@ The ``sort`` filter sorts an array:
 
 .. code-block:: jinja
 
-    {% for use in users|sort %}
+    {% for user in users|sort %}
         ...
     {% endfor %}