Fix isNode typo

c3.js

@@ -1041,7 +1041,7 @@
     c3_chart_internal_fn.updateSvgSize = function () {
         var $$ = this,
             brush = $$.svg.select(".c3-brush .background");
-        $$.svg.attr('width', $$.currentWidth + (isNode ? 10 : 0)).attr('height', $$.currentHeight); 
+        $$.svg.attr('width', $$.currentWidth + (isNode() ? 10 : 0)).attr('height', $$.currentHeight); 
         $$.svg.selectAll(['#' + $$.clipId, '#' + $$.clipIdForGrid]).select('rect')
             .attr('width', $$.width)
             .attr('height', $$.height);

spec/core-spec.js

@@ -42,7 +42,7 @@ describe('c3 chart', function () {
 
         it('should have same width', function () {
             var svg = d3.select('#chart svg');
-            expect(+svg.attr('width')).toBe(650);
+            expect(+svg.attr('width')).toBe(640);
         });
 
         it('should have same height', function () {

spec/legend-spec.js

@@ -32,7 +32,7 @@ describe('c3 chart legend', function () {
 
         it('should be located on the center of chart', function () {
             var box = chart.internal.legend.node().getBoundingClientRect();
-            expect(box.left + box.right).toBe(918);
+            expect(box.left + box.right).toBe(640);
         });
 
     });

src/core.js

@@ -820,7 +820,7 @@ c3_chart_internal_fn.transformAll = function (withTransition, transitions) {
 c3_chart_internal_fn.updateSvgSize = function () {
     var $$ = this,
         brush = $$.svg.select(".c3-brush .background");
-    $$.svg.attr('width', $$.currentWidth + (isNode ? 10 : 0)).attr('height', $$.currentHeight); 
+    $$.svg.attr('width', $$.currentWidth + (isNode() ? 10 : 0)).attr('height', $$.currentHeight); 
     $$.svg.selectAll(['#' + $$.clipId, '#' + $$.clipIdForGrid]).select('rect')
         .attr('width', $$.width)
         .attr('height', $$.height);