Fix bug in JSON character quote table.

src/json.js

Index: src/json.js
diff --git a/src/json.js b/src/json.js
index 5dd776899b6f942d5d0e795dd373be7df924de30..a39d7c4a97c60ac45168848435b98dccf8955fe2 100644
--- a/src/json.js
+++ b/src/json.js
@@ -74,7 +74,7 @@ var characterQuoteCache = {
   '\f': '\\f',  // ASCII 12, Formfeed
   '\r': '\\r',  // ASCII 13, Carriage Return
   '\"': '\\"',
-  '/': '\\/'
+  '\\': '\\\\'
 };
 
 function QuoteSingleJSONCharacter(c) {