code: public void lineTo(float x, float y) {
          content.append(x).append(' ').append(y).append(" l").append_i(separator);
      }
docs: Appends a straight line segment from the current point <I>(x, y)</I>. The new current
  point is <I>(x, y)</I>.
  
  @param       x               new x-coordinate
  @param       y               new y-coordinate