fix docs, fix line calculations, close #829

resources/doc-includes/ShapeParams.txt

@@ -30,7 +30,7 @@
      * @param {String} [config.fillPriority] can be color, linear-gradient, radial-graident, or pattern.  The default value is color.  The fillPriority property makes it really easy to toggle between different fill types.  For example, if you want to toggle between a fill color style and a fill pattern style, simply set the fill property and the fillPattern properties, and then use setFillPriority('color') to render the shape with a color fill, or use setFillPriority('pattern') to render the shape with the pattern fill configuration
      * @param {String} [config.stroke] stroke color
      * @param {Number} [config.strokeWidth] stroke width
-     * @param {Boolean} [config.hitStrokeWidth] size of the stroke on hit canvas.  The default is "auto" - equals to strokeWidth
+     * @param {Number} [config.hitStrokeWidth] size of the stroke on hit canvas.  The default is "auto" - equals to strokeWidth
      * @param {Boolean} [config.strokeHitEnabled] flag which enables or disables stroke hit region.  The default is true
      * @param {Boolean} [config.perfectDrawEnabled] flag which enables or disables using buffer canvas.  The default is true
      * @param {Boolean} [config.shadowForStrokeEnabled] flag which enables or disables shasow for stroke.  The default is true

src/shapes/Line.ts

@@ -199,7 +199,7 @@ export class Line<Config extends LineConfig = LineConfig> extends Shape<
         points[0],
         points[1],
         ...this._getTensionPoints(),
-        points[points.length - 2],
+        points[points.length - 1],
         points[points.length - 2]
       ];
     } else {

test/unit/shapes/Image-test.js

@@ -117,7 +117,7 @@ suite('Image', function() {
     imageObj.onload = function() {
       var stage = addStage();
       var layer = new Konva.Layer();
-      darth = new Konva.Image({
+      var darth = new Konva.Image({
         x: 200,
         y: 75,
         image: imageObj,