Hi Werner, that’s a very nice patch done in a quite methodical way. I just have a question: https://codereview.appspot.com/564590043/diff/546570043/Documentation/notatio... File Documentation/notation/staff.itely (left): https://codereview.appspot.com/564590043/diff/546570043/Documentation/notatio... Documentation/notation/staff.itely:1487: I’m not familiar with the state of instrumentCues; why did this sentence need to be removed? (Just out of curiosity; I’m not implying it didn’t.)
\addInstrumentDefinition is deprecated; see commit a7c014b60702e96bbc376892249b495bc10b8662. I've just removed the last documentation remnants.