From 37e9d2557942d92aea8ae9260e311297a47142fc Mon Sep 17 00:00:00 2001
From: Benoit Larroque <zeta.ben@gmail.com>
Date: Wed, 23 Dec 2015 14:32:59 +0100
Subject: [PATCH] Fix non ES5 compliant regexp

ES5 appears to require that { be escaped when not used as part of a quantifier. While this works fine in browsers it appears to choke less lenient runtimes (e.g. Duktape).
---
 lib/chai/utils/getMessage.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/chai/utils/getMessage.js b/lib/chai/utils/getMessage.js
index 326d5eb3a..dedd8f9d8 100644
--- a/lib/chai/utils/getMessage.js
+++ b/lib/chai/utils/getMessage.js
@@ -43,9 +43,9 @@ module.exports = function (obj, args) {
   if(typeof msg === "function") msg = msg();
   msg = msg || '';
   msg = msg
-    .replace(/#{this}/g, function () { return objDisplay(val); })
-    .replace(/#{act}/g, function () { return objDisplay(actual); })
-    .replace(/#{exp}/g, function () { return objDisplay(expected); });
+    .replace(/#\{this\}/g, function () { return objDisplay(val); })
+    .replace(/#\{act\}/g, function () { return objDisplay(actual); })
+    .replace(/#\{exp\}/g, function () { return objDisplay(expected); });
 
   return flagMsg ? flagMsg + ': ' + msg : msg;
 };