How to get "the tab sequence" of a unicode as we enter in the REPL in Julia code?

People even use UTF-8 on (recent) mainframes (UTF-EBCDIC never got popular), while probably not for most programs, and not sure about for actual filenames: IBM Documentation

and on OS/2 (I see UTF-8 and UCS-2 at Alex Taylor: OS/2 Universal Language Support maybe only for REXX).