Datepicker: Translation displays HTML entities when setting some formats

When using a format where a week day is displayed, if the day has accents they will be shown with HTML entities.

Steps to reproduce it:

• Load datepicker js and set the Spanish i18n translation.
• Initialize a form date field setting this format:

$( ".selector" ).datepicker({ dateFormat: "DD, d MM, yy" });

Now when you click on the field, the datepicker appears. Select Wednesday, so it should show:

Miércoles, 22 Agosto, 2012

But instead it shows this:

Miércoles, 22 Agosto, 2012

In order to fix that, the i18n file should replace all those HTML entities with the accented letter.