On "luatools --generate" I get this error message:
luac: ...bdbf68d574f1472c0c2a0dcccac69/trees/ 
8380572d1d594c806eb224cb2d00c228.tma:20: unfinished string near ''Icon'

This could be caused by the fact that my system (Macintosh OSX) here  
and there files with the name Icon? (the ? is part of the name) are  
sprinkled.
I suspect the unfinished string is triggered by the trailing  
questionmark
Is it harmful? Can this be prevented, acting on the maxim: "silence  
the compiler"?

Hans van der Meer