Tooltip for clock settings

[Vendo Bici]

Hello,

 i have noticed that the tooltip for clock settings show "Format
codes: man 3 strftime; %n for line break" but actually there isn't
such a man page.

(screenshot here, 2nd image: http://goo.gl/SzoMpZ )

Maybe %a %x  %R as a suggestion for abbreviated weekday name according
to the current locale,  preferred date representation for the current
locale and time in 24-hour notation could be better?

Thank you.
-- 
Francesco