bin/strjoin


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#!/bin/sh
sep=$1
shift
if [ $# -gt 0 ]
then	printf %s "$1"
	shift
	[ $# -gt 0 ] && printf -- "$sep"%s "$@"
else	read -r a
	printf '%s' "$a"
	while read -r a
	do	printf -- "$sep"'%s' "$a"
	done
fi