Function stringify

test/angular/1.3/angular.js:10200–10215

(value)

        };

        var stringify = function(value) {
          if (value == null) { // null || undefined
            return '';
          }
          switch (typeof value) {
            case 'string':
              break;
            case 'number':
              value = '' + value;
              break;
            default:
              value = toJson(value);
          }

          return value;
        };

        return extend(function interpolationFn(context) {
            var i = 0;