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Lexer Error: Unexpected next character  at columns 8-8 [ö] in expression [item.Teközel].

var app = angular.module('xApp', ['smart-table', 'ngSanitize']);

isValidIdentifierStart: function(ch) {
    return ('a' <= ch && ch <= 'z' ||
            'A' <= ch && ch <= 'Z' ||
            '_' === ch || ch === '$' ||
            (129 <= ch.charCodeAt(0) && ch.charCodeAt(0) <= 496));
  }

<!DOCTYPE HTML>
<html ng-app="demo">
    <head>
        <title>Demo</title>
    </head>
    <body ng-controller="DefaultController as ctrl">
        <span ng-bind="ctrl.Teközel"></span>

       <script type="text/javascript" src="scripts/angular.js"></script>
       <script type="text/javascript" src="scripts/app/main.js"></script>
    </body>
</html>

angular
    .module('demo', [])
    .controller('DefaultController', DefaultController);

    function DefaultController() {
        var vm = this;
        vm.Teközel = 'Hello, World!';
    }