I think the underlying question is: does/can cling know about doxygen comments for functions and classes, the same way as Python functions and classes store theirs in their __doc__ attribute? (because all ways to use ROOT interactively ā ROOT prompt, jupyter notebooks and Python/PyROOT ā ultimately rely on cling to call into the C++ code).
Iām pretty sure the answer is that cling, like the good C++ interpreter it is, completely ignores comments 
@Axel is that right?