For example:

function update($new_instance, $old_instance) {
     $instance = $old_instance;
     $array = array('title','aside','image','link','quote','status');
     foreach ($array as $a) {
          $instance[$a] = strip_tags($new_instance[$a]);
     }
     return $instance;
}

For those unfamiliar with the text-domains, this page in the Codex explains it well:

http://codex.wordpress.org/I18n_for_WordPress_Developers

Basically you need to add a parameter to any instances of __('Some text'); in order for the text to be translatable (not required).

function update($new_instance, $old_instance) {
return array_map( 'strip_tags', $new_instance );
}

Also __('View Aside posts') and other calls to __() without a text domain will not work.