fix(NgModelController): typo $rawModelValue -> $$rawModelValue

Author: PatrickJS

src/ng/directive/input.js

@@ -1721,7 +1721,7 @@ var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$
     function($scope, $exceptionHandler, $attr, $element, $parse, $animate, $timeout, $rootScope, $q, $interpolate) {
   this.$viewValue = Number.NaN;
   this.$modelValue = Number.NaN;
-  this.$rawModelValue = undefined; // stores the parsed modelValue / model set from scope regardless of validity.
+  this.$$rawModelValue = undefined; // stores the parsed modelValue / model set from scope regardless of validity.
   this.$validators = {};
   this.$asyncValidators = {};
   this.$parsers = [];