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#!/bin/sh
# Generate blank lines
if [ "$#" -ne 1 ] || [ "$1" -lt 0 ] ; then
printf >&2 'bl: Non-negative line count needed as sole argument\n'
exit 2
fi
n=0
while [ "$n" -lt "${1:-0}" ] ; do
printf '\n'
n=$((n+1))
done
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