Function rltk::draw_box_double

pub fn draw_box_double(
    console: &mut dyn Console, 
    sx: i32, 
    sy: i32, 
    width: i32, 
    height: i32, 
    fg: RGBA, 
    bg: RGBA
)

Draws a box, starting at x/y with the extents width/height using CP437 line characters