angularjs - why trim content

Angularjs will automatically trim text content. How to disable it?

HTML

<html ng-app="MyApp">
    <body>
    <div ng-controller='MyCtrl'>
        Input something has leading or ending spaces, you will see which will be trimed:
        <hr/>
        <input type="text" ng-model="name" />
        Hello, [{{name}}]!
        trim
    </div>
    </body>
</html>

CSS

</style>
<script src="http://code.angularjs.org/angular-1.0.0rc10.min.js"></script>
<style>

JavaScript

var app = angular.module('MyApp', []);

app.controller('MyCtrl', ['$scope', function($scope) {
    $scope.show = function() {
        alert('['+$scope.name+']');
    };
}]);