I think this is what was meant, see cf7832d6

Change-Id: I626e3a36426958d7ba1fd320cf8e1a3bf2f3595f
Reviewed-on: https://gerrit.libreoffice.org/11980Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

oox/source/core/xmlfilterbase.cxx

@@ -160,8 +160,8 @@ void registerNamespaces( FastParser& rParser )
 {
     const Sequence< beans::Pair<OUString, sal_Int32> > ids = NamespaceIds::get();
 
-    // Filter out duplicates: a namespace can have multiple URL's, think of
-    // strict vs traditional.
+    // Filter out duplicates: a namespace can have multiple URLs, think of
+    // strict vs transitional.
     std::set<sal_Int32> aSet;
     for (sal_Int32 i = 0; i < ids.getLength(); ++i)
         aSet.insert(ids[i].Second);