Fixed a couple of links in editor manual

This should fix PDF builds as well

docs/editor_manual/editing_existing_pages.rst

@@ -3,7 +3,7 @@ Editing existing pages
 
 There are two ways that you can access the edit screen of an existing page:
 
-* Clicking the title of the page in an `Explorer page <the_explorer_page.html>`_ or in `search results <using_search.html>`_.
+* Clicking the title of the page in an :doc:`Explorer page <finding_your_way_around/the_explorer_page>` or in :doc:`search results <finding_your_way_around/using_search>`.
 * Clicking the *Edit* link below the title in either of the situations above.
 
 .. image:: ../_static/images/screen12_edit_screen_overview.png