Make logging nicer

source/RobotAPI/libraries/armem_robot_state/common/localization/TransformHelper.cpp

@@ -149,7 +149,7 @@ namespace armarx::armem::common::robot_state::localization
             }
             else
             {
-                ARMARX_WARNING << deactivateSpam(60) << "Cannot perform tf lookup '" << parentFrame << " -> " << frame << "'";
+                ARMARX_WARNING << deactivateSpam(60) << "Cannot perform tf lookup '" << parentFrame << "' -> '" << frame << "'.";
             }
         };