Don't return a nested array of paths

index.js

@@ -2,12 +2,10 @@ var path = require('path');
 var bourbon = require('bourbon');
 
 module.exports = {
-
-  includePaths: [bourbon.includePaths],
+  includePaths: bourbon.includePaths,
 
   with: function() {
     var paths  = Array.prototype.slice.call(arguments);
     return [].concat.apply([bourbon.includePaths], paths);
   }
-
-};
+};

test/path_test.js

@@ -0,0 +1,10 @@
+const chai = require('chai');
+const assert = chai.assert;
+const bourbon = require('../');
+
+describe('#includePaths', function() {
+  it('should export an array of paths', function() {
+    assert.isArray(bourbon.includePaths);
+    assert.isString(bourbon.includePaths[0], 'first #includePaths path');
+  });
+});