docs(ngDisabled): improve wording

src/ng/directive/attrs.js

@@ -159,17 +159,18 @@
  *
  * @description
  *
- * We shouldn't do this, because it will make the button enabled on Chrome/Firefox but not on IE8 and older IEs:
+ * The HTML specification does not require browsers to preserve the values of boolean attributes
+ * such as disabled. (Their presence means true and their absence means false.)
+ * If we put an Angular interpolation expression into such an attribute then the
+ * binding information would be lost when the browser removes the attribute.
+ *
+ * For example, this code will make the button enabled on Chrome/Firefox but not on IE8 and older IEs:
  * ```html
  * <div ng-init="scope = { isDisabled: false }">
  *  <button disabled="{{scope.isDisabled}}">Disabled</button>
  * </div>
  * ```
  *
- * The HTML specification does not require browsers to preserve the values of boolean attributes
- * such as disabled. (Their presence means true and their absence means false.)
- * If we put an Angular interpolation expression into such an attribute then the
- * binding information would be lost when the browser removes the attribute.
  * The `ngDisabled` directive solves this problem for the `disabled` attribute.
  * This complementary directive is not removed by the browser and so provides
  * a permanent reliable place to store the binding information.