class Magick::RVG::PathData

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

the coordinates are relative.
true the coordinates are absolute, otherwise
Add a moveto command. If abs is 
def moveto(abs, x, y, *coords)
  @path << sprintf('%s%g,%g ', (abs ? 'M' : 'm'), x, y)
  # "subsequent pairs are treated as implicit lineto commands"
  add_points(2, *coords)
end