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In the code there are examples of t() being used like:
t('Override ' . $name . ' setting')
This really isn't all that good for translators. Instead it should be something like:
t('Override !name setting', array('!name' => $name))
This allows the translators to put the variable where ever it is appropriate in the text.
You can find more detail at http://api.drupal.org/api/function/t/6