[O] org-time-stamp-custom-formats: change the default <> not suited for LaTeX export

[Uwe Brauer]

Hi

A week ago I asked how to change the format of org-time-stamp since the
default format is not suited when exporting to LaTeX, the problem are
the <> 

I'd prefer the format

    -   «24-02-2016 Wed»

I set org-display-custom-times to t
and then did 
(customize-option (quote org-time-stamp-custom-formats))
and set it to

("$«%d-%m-%Y %a»$" . "$«%d-%m-%Y %a %H:%M»$")

but I cannot get rid of the < >

Any comments?

Thanks

Uwe Brauer