add-line's behavior does not match the documentation

[schanzer]

According to the documentation, these two lines of code should have the line starting at the same coord, and ending at a different place. That doesn't happen.

add-line(circle(20, "outline", "maroon"), 0, 40, 40, 0, "orange")
add-line(circle(20, "outline", "maroon"), 0, 40, 20, 0, "orange")