class Magick::RVG::PathData

def lineto(abs, x, y, *coords)

the coordinates are relative.
true the coordinates are absolute, otherwise
pairs may be specified. If abs is
Add a lineto command. Any number of x,y coordinate 
def lineto(abs, x, y, *coords)
  @path << sprintf('%s%g,%g ', (abs ? 'L' : 'l'), x, y)
  # "a number of coordinate pairs may be specified to draw a polyline"
  add_points(2, *coords)
end