Update step_06.ngdoc

Author: ravefalcon92

docs/content/tutorial/step_06.ngdoc

@@ -230,9 +230,8 @@ You can now rerun `npm run protractor` to see the tests run.
 
 * Reverse the sort order by adding a `-` symbol before the sorting value:
   `<option value="-age">Oldest</option>`
-  Upon refreshing the page, you'll see that the default selection of the "age" option in "Sort by" is blank again.
-  Try fixing this in **`app/phone-list/phone-list.component.js`:**
-  
+  After making this change, you'll notice that the drop-down list has a blank option selected and does not default to age anymore.
+  Fix this by updating the `orderProp` value in `phone-list.component.js` to match the new value on the `<option>` element.
 
 
 ## Summary