fix group update text

src/groups.js

@@ -499,7 +499,7 @@ var async = require('async'),
 					deleted: '0',
 					hidden: data.hidden || '0',
 					system: system ? '1' : '0',
-					'private': data.private || '1'
+					private: data.private || '1'
 				},
 				tasks = [
 					async.apply(db.sortedSetAdd, 'groups:createtime', now, data.name),

tests/groups.js

@@ -186,6 +186,9 @@ describe('Groups', function() {
 	});
 
 	describe('.update()', function() {
+		before(function(done) {
+			Groups.join('foobar', 1, done);
+		});
 		it('should change an aspect of a group', function(done) {
 			Groups.update('foo', {
 				description: 'baz'