Update an old example in :help 'cpt'.

common/locale/en-US/options.xml

@@ -532,9 +532,9 @@
         </p>
 
         <p>
-            The order is important, such that <se opt="complete"><str delim="">bsf</str></se> will
+            The order is important, such that <se opt="complete">
-            list bookmarks followed by matching quick searches and then
+            <str delim="">bookmark,search,file</str></se> will list bookmarks
-            matching files.
+            followed by matching quick searches and then matching files.
         </p>
 
         <note>