From e7177d3159c5aa5616899196ce28f9b4f154b3c6 Mon Sep 17 00:00:00 2001
From: mmieszek
Date: Wed, 16 Oct 2013 23:19:24 +0200
Subject: docs(guide/expression): fix duplicate key error in example

The example that demonstrates how to parse expressions can fail if you
pass in the same expression twice.  By using "track by $index" we can
fix this.

Closes #4472
---
 docs/content/guide/expression.ngdoc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/content/guide/expression.ngdoc b/docs/content/guide/expression.ngdoc
index 980bb136..89f48bfd 100644
--- a/docs/content/guide/expression.ngdoc
+++ b/docs/content/guide/expression.ngdoc
@@ -70,7 +70,7 @@ You can try evaluating different expressions here:
    <input type='text' ng-model="expr" size="80"/>
    <button ng-click="addExp(expr)">Evaluate</button>
    <ul>
-    <li ng-repeat="expr in exprs">
+    <li ng-repeat="expr in exprs track by $index">
       [ <a href="" ng-click="removeExp($index)">X</a> ]
       <tt>{{expr}}</tt> => <span ng-bind="$parent.$eval(expr)"></span>
      </li>
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