[fix] Remove useless "replace" function

This line of replace function will make the sign " not working in the formatter string function.

Test it on both debug and release mode and they are working well.

Related issue: #96 (comment)

src/util/toString.js

@@ -17,8 +17,7 @@ export default function toString(obj) {
   do {
     result = result
       .replace('"~--demo--~', "")
-      .replace('~--demo--~"', "")
-      .replace(/\\\"/g, '"'); //最后一个replace将release模式中莫名生成的\"转换成"
+      .replace('~--demo--~"', "");
   } while (result.indexOf("~--demo--~") >= 0);
   // 添加此行把unicode转为中文（否则formatter函数中含有中文在release版本中显示不出来）
   result = unescape(result.replace(/\\u/g, "%u"));