code: function drawLinearLineNeedle(context, options, sX, sY, eX, eY, length,
                                isRight)
  {
      context.lineWidth = options.needleWidth;
      context.strokeStyle = needleStyle(context, options, length, isRight);
  
      context.beginPath();
      context.moveTo(sX, sY);
      context.lineTo(eX, eY);
      context.stroke();
      context.closePath();
  }
docs: /* istanbul ignore next: private, not testable 
  Draws line needle shape
  
  @access private
  @param {Canvas2DContext} context
  @param {LinearGaugeOptions} options
  @param {number} sX
  @param {number} sY
  @param {number} eX
  @param {number} eY
  @param {number} length
  @param {boolean} [isRight]