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Update en/tutorials-and-examples/simple-acl-controlled-application/simple-acl-controlled-application.rst

Added $options = array() parameter to beforeSave Codesnippet, otherwise CakePHP complains with the following error:
"Strict (2048): Declaration of User::beforeSave() should be compatible with Model::beforeSave($options = Array) [ROOT/Model/User.php, line 112]"