docs(compile): fix typo in 'Attributes' description

Closes #4589

src/ng/compile.js

@@ -1824,7 +1824,7 @@ function directiveNormalize(name) {
  *
  * @description
  * A shared object between directive compile / linking functions which contains normalized DOM
- * element attributes. The the values reflect current binding state `{{ }}`. The normalization is
+ * element attributes. The values reflect current binding state `{{ }}`. The normalization is
  * needed since all of these are treated as equivalent in Angular:
  *
  *    <span ng:bind="a" ng-bind="a" data-ng-bind="a" x-ng-bind="a">