gtk3 reference manual does not match the header file

[yetist <yetist gmail com>]

in devhelp, the "draw" signal about GtkWidget is:
gboolean user_function (GtkWidget *widget, CairoContext *cr, gpointer      user_data)
but in gtkwidget.h file, it is:
gboolean (* draw)   (GtkWidget  *widget, cairo_t  *cr);

The “enter-notify-event” and “leave-notify-event” signal has the same problems:
in Devhelp,  the second argument is  "GdkEvent  *event", but in header file is "GdkEventCrossing  *event".

you can check this from the tarball here:
http://ftp.gnome.org/pub/gnome/sources/gtk+/3.12/gtk+-3.12.2.tar.xz