[Vala] New signal contact syntax

[Andrea Del Signore <sejerpz tin it>]

Hi,

I just saw that this bug was fixed:
http://bugzilla.gnome.org/show_bug.cgi?id=566847

What's the syntax for the signal detail info?

Like in:

obj.notify["property_name"] += this.on_property_name_changed;

Regards,
        Andrea