Fix ngRepeat to allow keys starting with $

[harikrishnan83]

Dear angular team,

The issue that this PR is addressing is very similar to #1463. ngRepeat Directive does not show object/map keys that begin with $. Plunker link http://plnkr.co/edit/0bzuZbzrVX9xLP7e6oHL?p=preview.

I have followed the same idea that was used in PR #6253.

Thanks for all the great work.

[mary-poppins]

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[mary-poppins]

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[btford]

@IgorMinar @tbosch Do we want this?

[tbosch]

This could break if someone wants to iterate over all properties of $scope using (key,value) in this, so this would be a breaking change.

@IgorMinar What do you think?

[srl295]

(a year later) Is this planned to go in? I didn't see the current behavior documented in ngRepeat docs that I could find, and was an unpleasant surprise. Yeah I know, dollar signs, but they do show up in remote data.