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rc/sh/echo2

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#!/usr/bin/env sh
# compat: +ash +bash +dash +hush -ksh +mksh +oksh +osh +posh +yash +zsh
echo2() { ### @-
### print arguments joined by spaces to stderr without parsing anything.
###
### ```
### $ echo -e 'this\nthat' those
### this
### that those
### $ echo2 -e 'this\nthat' those
### -e this\nthat those
### ```
local IFS=' '
printf "%s\n" "$*" >&2
}
[ -n "${preload+-}" ] || echo2 "$@"