Docs: clarify docs for "each" filter operator

editions/tw5.com/tiddlers/filters/each.tid

@@ -18,7 +18,7 @@ Each input title is processed in turn. The value of field <<.place F>> in the co
 ;each:list-item
 :The value is treated as a [[title list|Title List]]. Each title in the list considered in turn. If it has not been encountered before, it is appended to the output.
 ;each:value
-:As long as the title is unique it is appended to the output. Even if no such tiddler exists.
+:As long as the title is unique it is appended to the output whether or not the corresponding tiddler exists.
 
 If a tiddler does not contain field <<.place F>>, it is treated as if the value of the field were empty.