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lang-bash
zsh until release 4.3.0, in sh emulation mode (which means the option shwordsplit is set), does word splitting on the resulting arguments.and that the only version of bash (the only shell you specifically mention by name) that needs a very corner case addition isbash-4.0.0 ... -4.0.27. May we call thata little biased report?zshin sh emulation there used to be a problem with${1+"$@"}, not"$@"alone.for arg do(without the;), the same mascheck page says:The original Almquist shell (ash) accepts all but the second variant.. Thus, the only really portable solution isfor arg <newline> do.${1+"$@"}construct which is not needed to loop over the positional parameters. My whole answer does say thatfor arg <newline> dois the most portable. I'm not sure I understand the point you're trying to make.