wp_localize_jquery_ui_datepicker parsing general settings date_format wrong

[naamb]

Hi,

I found that function wp_localize_jquery_ui_datepicker under wp-includes/script-loader.php isn't formatting date_format right.

date_format settings may include scaped characters as in spanish: "j \d\e F \d\e Y"
and this function using php str_replace isn't having in consideration that posibility so we end up having: "d \dd\e MM \dd\e yy"

Expected output should be: "d \d\e MM \d\e yy"

​wp_localize_jquery_ui_datepicker

Thanks,

[Rarst]

wp_date() has the latest iteration of date format parser/replacer and is thoroughly unit tested, should be a good basis to adapt for this, if someone wants to take a stab at it.