dojo.collections.DictionaryIterator doesn't support iteration over one item

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Reproduce the bug with the following code snippet:

//Create a dictionary with one item
var aDictionary = new dojo.collections.Dictionary();
aDictionary.add("singleItem",anItem);

//Iterate it with a "atEnd" while loop
var iterator = aDictionary.getIterator();
while (!iterator.atEnd ) {
     alert(iterator.key);
     iterator.moveNext();
}	

The alert statement will not be executed because atEnd is incorrectly initialized in DictionaryIterator?. Line 47 of Collections.js,

   this.atEnd = (position>=arr.length-1);

should be replaced with

   this.atEnd = (position>=arr.length);

in order to support while loops using atEnd