Fixing gruntfile and renamed to svg_classname

Gruntfile.coffee

@@ -89,8 +89,7 @@ module.exports = (grunt) ->
           c3:
             src: 'c3.js'
             options:
-                #specs: 'spec/*-spec.js'
+              specs: 'spec/*-spec.js'
-              specs: 'spec/core-spec.js'
               helpers: 'spec/*-helper.js'
               styles: 'c3.css'
               vendor: 'https://rawgit.com/mbostock/d3/v3.5.0/d3.min.js'

spec/core-spec.js

@@ -4,7 +4,7 @@ describe('c3 chart', function () {
     var chart;
 
     var args = {
-        classname: 'customclass',
+        svg_classname: 'customclass',
         data: {
             columns: [
                 ['data1', 30, 200, 100, 400, 150, 250],

src/core.js

@@ -252,8 +252,8 @@ c3_chart_internal_fn.initWithData = function (data) {
         .on('mouseenter', function () { return config.onmouseover.call($$); })
         .on('mouseleave', function () { return config.onmouseout.call($$); });
 
-    if ($$.config.classname) {
+    if ($$.config.svg_classname) {
-        $$.svg.attr('class', $$.config.classname);
+        $$.svg.attr('class', $$.config.svg_classname);
     }
 
     // Define defs