artist-draw-line is a compiled Lisp function in `artist.el'.

(artist-draw-line X1 Y1 X2 Y2)

Draw a line from X1, Y1 to X2, Y2.

Output is a line, which is a list (END-POINT-1 END-POINT-2 SHAPE-INFO).

END-POINT-1 and END-POINT-2 are two-element vectors on the form [X Y].
SHAPE-INFO is a list of vectors [X Y SAVED-CHAR NEW-CHAR].