make multi token not preserved warning more actionable

Author: ochafik

examples/server/server.cpp

@@ -385,7 +385,7 @@ struct server_task {
                         params.sampling.preserved_tokens.insert(ids[0]);
                     } else {
                         // This may happen when using a tool call style meant for a model with special tokens to preserve on a model without said tokens.
-                        LOG_DBG("Not preserved because more than 1 token: %s\n", t.get<std::string>().c_str());
+                        LOG_DBG("Not preserved because more than 1 token (wrong chat template override?): %s\n", t.get<std::string>().c_str());
                     }
                 }
             }