fix improper character escaping

lib/serialize.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var util = require('util');
+var json2 = require('JSON2');
 
 module.exports = serialize;
 
@@ -24,7 +25,7 @@ function serialize(obj) {
     // Creates a JSON string representation of the object and uses placeholders
     // for functions and regexps (identified by index) which are later
     // replaced.
-    str = JSON.stringify(obj, function (key, value) {
+    str = json2.stringify(obj, function (key, value) {
         if (typeof value === 'function') {
             return '@__FUNCTION_' + (functions.push(value) - 1) + '__@';
         }

package.json

@@ -40,6 +40,9 @@
   "peerDependencies": {
     "express": "3.x"
   },
+  "dependencies": {
+    "JSON2": "0.1.0"
+  },
   "devDependencies": {
     "chai": "*",
     "express": "3.x",

test/unit/serialize.js

@@ -52,6 +52,11 @@ describe('serialize( obj )', function () {
         it('should deserialize a JSON string to a JSON object', function () {
             expect(JSON.parse(serialize(data))).to.deep.equal(data);
         });
+
+        it('should serialize weird whitespace characters correctly', function () {
+            var ws = String.fromCharCode(8232);
+            expect(eval(serialize(ws))).to.equal(ws);
+        });
     });
 
     describe('functions', function () {