Add get_args to graphics.txt.

doc/graphics.txt

@@ -74,6 +74,7 @@ g:fill_path(p)                                                 -- Fills the curr
 -- Additional functions
 expandedsymbol = pd:Class:canvas_realizedollar(s)              -- Expand dollar symbols in patch canvas context
 pd:Class:set_args(args)                                        -- Set the object arguments to be saved in the patch file
+pd:Class:get_args()                                            -- Get the object arguments to be saved in the patch file
 
 
 Basic example