I belive zimbatm refers to the bash-specific ${var@Q} to expand to a form suitable as re-input into the shell. There are a few other bash-specific syntaxes lik

I belive zimbatm refers to the bash-specific ${var@Q} to expand to a form suitable as re-input into the shell. There are a few other bash-specific syntaxes like that (under "parameter transformation" in the manual page).