Small clarification in subscript adverbs

After masak++ made me think about it more

Author: lizmat

S02-bits.pod

@@ -2538,12 +2538,12 @@ These combinations are considered legal and mean the following:
   :delete :!v            delete, return values of all keys attempted
   :delete :k             delete, return actually deleted keys
   :delete :!k            delete, return all keys attempted to delete
-  :delete :exists        delete, return Bools indicating deletion successful
-  :delete :!exists       delete, return Bools indicating deletion not successful
-  :delete :exists :p     delete, return pairs with key/True for deleted
-  :delete :exists :!p    delete, return pairs with key/Bool deletion successful
-  :delete :exists :kv    delete, return list with key,True for deleted
-  :delete :exists :!kv   delete, return list with key,Bool deletion successful
+  :delete :exists        delete, return Bools indicating keys existed
+  :delete :!exists       delete, return Bools indicating keys did not exist
+  :delete :exists :p     delete, return pairs with key/True for key existed
+  :delete :exists :!p    delete, return pairs with key/Bool whether key existed
+  :delete :exists :kv    delete, return list with key,True for key existed
+  :delete :exists :!kv   delete, return list with key,Bool whether key existed
 
 An implementation is free to silently ignore any other combinations or
 silently prefer one of the adverbs given above any other.