fix generate additional params

Author: Mavrin

README.md

@@ -25,9 +25,9 @@ $ npm install gitbook-plugin-jsfiddle --save
 Param `type` can be 'frame' or 'script'.
 Also you can use other params read more https://medium.com/jsfiddle-updates/new-jsfiddle-embeds-93ab7a51ee11#.vt34bxchv
 If you need override setting for certain fiddle,you can just add this param in hash
-`//jsfiddle.net/zalun/NmudS/#fontColor=green&type=frame`
+`https://jsfiddle.net/4o4z6fqn/9/#fontColor=00FF00&type=frame`
 ### 3. paste jsfiddle embedded code to you book something like
-`[source code](//jsfiddle.net/zalun/NmudS/)`
+`[source code](https://jsfiddle.net/4o4z6fqn/9/)`
 
 will be rendered like [my book](https://api.taucharts.com/tutorials/1min.html) does
 Also you can see simple example in https://github.com/Mavrin/gitbook-example

package.json

@@ -2,7 +2,7 @@
   "name": "gitbook-plugin-jsfiddle",
   "description": "JSFiddle Integration into GitBook",
   "main": "index.js",
-  "version": "1.0.0-alpha.6",
+  "version": "1.0.0-alpha.7",
   "author": {
     "name": "Konstantin Krivlenia"
   },

src/replace.js

@@ -45,10 +45,10 @@ var generateAdditionalParams = function (config) {
     if (config.theme) {
         params += config.theme + '/';
     }
-    var colors = _.chain(config).omit('href', 'type', 'theme', 'tabs', 'width', 'height').reduce(function (colors, value, color) {
+    var colors = _.chain(config).omit(['href', 'type', 'theme', 'tabs', 'width', 'height']).reduce(function (colors, value, color) {
         colors += color + '=' + value + '&';
         return colors;
-    }, '');
+    }, '').value();
     colors = colors.replace(/&$/, '');
     if (colors) {
         return params + '?' + colors;

tests/replace.js

@@ -16,6 +16,16 @@ test('replacer', function (assert) {
           <script async src="//jsfiddle.net/zalun/NmudS/embed/js/dark/?bodyColor=red&accentColor=red"></script>
         </div>`.replace(/\s+/g, ' ')
         , 'replace on script with params and dark theme');
+    assert.equal(
+        replace(str, {
+            type: 'script',
+            theme: "dark",
+            tabs: ['js']
+        }),
+        `<div>
+          <script async src="//jsfiddle.net/zalun/NmudS/embed/js/dark/"></script>
+        </div>`.replace(/\s+/g, ' ')
+        , 'replace on script without colors params and dark theme');
     assert.equal(
         replace(str, {
             type: 'script',